{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89482", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.712Z", "datePublished": "2026-09-11T19:43:37.236Z", "dateUpdated": "2026-10-19T08:47:32.356Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:32.356Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone\n\nCommit 25e5cb780e62 (\"nvme-tcp: fix possible crash in write_zeroes\nprocessing\") established that blk_rq_payload_bytes() must not be read\nwithout first checking blk_rq_nr_phys_segments(), and recorded the\nresult in nvme_tcp_setup_cmd_pdu() as req->data_len. The receive side\nwas left as it was.\n\nThe two differ for REQ_OP_WRITE_ZEROES, which has no physical segments\nbut a non-zero blk_rq_bytes(), so setup leaves req->iter untouched\nwhile the receive gate lets a C2HData through and nvme_tcp_recv_data()\ncopies into whatever the previous command on that tag left there. The\ndriver-private area is zeroed only when the tag set is allocated.\n\nReproduced with a test target that leaves a residual iterator on a tag\nand then sends a C2HData for a WRITE_ZEROES command on the same tag:\n\nBUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330\nWrite of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103\n\nCPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nWorkqueue: nvme_tcp_wq nvme_tcp_io_work\nCall Trace:\n <TASK>\n dump_stack_lvl+0x53/0x70\n kasan_report+0xce/0x100\n ? _copy_to_iter+0x642/0x1330\n kasan_check_range+0x105/0x1b0\n __asan_memcpy+0x3c/0x60\n _copy_to_iter+0x642/0x1330\n ? __pfx_sock_has_perm+0x10/0x10\n ? worker_thread+0x45b/0xd10\n ? __pfx__copy_to_iter+0x10/0x10\n ? _raw_spin_lock_bh+0x83/0xe0\n ? __pfx__raw_spin_lock_bh+0x10/0x10\n __skb_datagram_iter+0xf3/0x820\n ? __pfx_simple_copy_to_iter+0x10/0x10\n ? __asan_memcpy+0x3c/0x60\n ? skb_copy_bits+0x58d/0x830\n skb_copy_datagram_iter+0x37/0x120\n nvme_tcp_recv_skb+0xa07/0x4320\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n __tcp_read_sock+0x1ab/0x810\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n ? __pfx_lock_sock_nested+0x10/0x10\n ? __pfx___tcp_read_sock+0x10/0x10\n nvme_tcp_try_recv+0x152/0x1e0\n ? __pfx_nvme_tcp_try_recv+0x10/0x10\n ? __pfx_mutex_unlock+0x10/0x10\n nvme_tcp_io_work+0x1e4/0x6c0\n ? __schedule+0x181a/0x49f0\n ? __pfx_nvme_tcp_io_work+0x10/0x10\n process_one_work+0x633/0x1030\n\nKeep the blk_rq_payload_bytes() test and add req->data_len to it. The\nold test is what rejects a C2HData naming a tag that is no longer in\nflight, because blk_update_request() zeroes rq->__data_len on\ncompletion; req->data_len and req->curr_bio are driver-private and\nsurvive completion, so they cannot stand in for it. Setup initialises\nthe iterator only when both req->curr_bio and req->data_len are set, so\nthe gate now tests the same two."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The nvme-tcp host receive path parses C2HData PDUs from a remote NVMe/TCP target over a routable TCP connection (typically port 4420); a malicious or compromised target, or an on-path attacker injecting into the stream, triggers the bug from the network.\nAC:L - A malicious target can advertise WRITE_ZEROES, wait for tag reuse after a data command, and send C2HData for that in-flight WRITE_ZEROES; leftover iterator state is deterministic because driver-private fields are not cleared on reuse, so no race or memory-layout luck is required.\nPR:N - NVMe/TCP authentication (TLS, DH-HMAC-CHAP) is optional and off by default; the vulnerable copy runs on C2HData from the connected peer, which needs no credentials or privileges on the victim host.\nUI:N - Once the host is connected to the target as persistent storage, ordinary filesystem and block I/O generate WRITE_ZEROES commands; the attacker sends the crafted PDU without any further victim action.\nS:U - The stale-iterator write corrupts memory in the same host kernel security authority; this is not a VM, IOMMU, or sandbox boundary crossing.\nC:H - nvme_tcp_recv_data() writes attacker-controlled C2HData through a leftover iov_iter into pages from a previously completed command on the same tag, a use-after-free of those buffers that can be turned into an arbitrary read via heap reuse.\nI:H - The copy is a use-after-free / wild write of attacker-chosen contents and length into reused kernel or page-cache memory, which is exploitable for arbitrary write and control-flow hijacking.\nA:H - The same stale-iterator write was reproduced as a KASAN wild-memory-access in _copy_to_iter from nvme_tcp_io_work and can oops or panic the host kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/host/tcp.c"], "versions": [{"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "32ea8ce96b9bd797c59c351ce490ffd97adaa8c0", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "7ed0b61bbc145988be292c4d3ec580aebd8d2bcd", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "b36161701cb366f416afdcf70771d432a7c74753", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "6a01b58263108eaf9869bb6f82f07709240c6589", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "641ad3a30ba560f0a9a610376c568d7b75d2a2aa", "status": "affected", "versionType": "git"}, {"version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36", "status": "affected", "versionType": "git"}, {"version": "f507ae6e33cbe56c4e3fe000434fc0ecc263d098", "status": "affected", "versionType": "git"}, {"version": "b1458c16f4e26e87492e58e4d24a1873bd09232a", "status": "affected", "versionType": "git"}, {"version": "5.4.36", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.6.8", "lessThan": "5.7", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/host/tcp.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/32ea8ce96b9bd797c59c351ce490ffd97adaa8c0"}, {"url": "https://git.kernel.org/stable/c/dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab"}, {"url": "https://git.kernel.org/stable/c/7ed0b61bbc145988be292c4d3ec580aebd8d2bcd"}, {"url": "https://git.kernel.org/stable/c/b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528"}, {"url": "https://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753"}, {"url": "https://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589"}, {"url": "https://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa"}, {"url": "https://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36"}], "title": "nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-89482", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:22:37.965026Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:39.839Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-89482", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:22:37.965026Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:22:38.509Z"}}], "cna": {"title": "nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The nvme-tcp host receive path parses C2HData PDUs from a remote NVMe/TCP target over a routable TCP connection (typically port 4420); a malicious or compromised target, or an on-path attacker injecting into the stream, triggers the bug from the network.\nAC:L - A malicious target can advertise WRITE_ZEROES, wait for tag reuse after a data command, and send C2HData for that in-flight WRITE_ZEROES; leftover iterator state is deterministic because driver-private fields are not cleared on reuse, so no race or memory-layout luck is required.\nPR:N - NVMe/TCP authentication (TLS, DH-HMAC-CHAP) is optional and off by default; the vulnerable copy runs on C2HData from the connected peer, which needs no credentials or privileges on the victim host.\nUI:N - Once the host is connected to the target as persistent storage, ordinary filesystem and block I/O generate WRITE_ZEROES commands; the attacker sends the crafted PDU without any further victim action.\nS:U - The stale-iterator write corrupts memory in the same host kernel security authority; this is not a VM, IOMMU, or sandbox boundary crossing.\nC:H - nvme_tcp_recv_data() writes attacker-controlled C2HData through a leftover iov_iter into pages from a previously completed command on the same tag, a use-after-free of those buffers that can be turned into an arbitrary read via heap reuse.\nI:H - The copy is a use-after-free / wild write of attacker-chosen contents and length into reused kernel or page-cache memory, which is exploitable for arbitrary write and control-flow hijacking.\nA:H - The same stale-iterator write was reproduced as a KASAN wild-memory-access in _copy_to_iter from nvme_tcp_io_work and can oops or panic the host kernel."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "32ea8ce96b9bd797c59c351ce490ffd97adaa8c0", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "7ed0b61bbc145988be292c4d3ec580aebd8d2bcd", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "b36161701cb366f416afdcf70771d432a7c74753", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "6a01b58263108eaf9869bb6f82f07709240c6589", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "641ad3a30ba560f0a9a610376c568d7b75d2a2aa", "versionType": "git"}, {"status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "lessThan": "3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36", "versionType": "git"}, {"status": "affected", "version": "f507ae6e33cbe56c4e3fe000434fc0ecc263d098", "versionType": "git"}, {"status": "affected", "version": "b1458c16f4e26e87492e58e4d24a1873bd09232a", "versionType": "git"}, {"status": "affected", "version": "5.4.36", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "5.6.8", "lessThan": "5.7", "versionType": "semver"}], "programFiles": ["drivers/nvme/host/tcp.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.270", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.109", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.50", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/nvme/host/tcp.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/32ea8ce96b9bd797c59c351ce490ffd97adaa8c0"}, {"url": "https://git.kernel.org/stable/c/dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab"}, {"url": "https://git.kernel.org/stable/c/7ed0b61bbc145988be292c4d3ec580aebd8d2bcd"}, {"url": "https://git.kernel.org/stable/c/b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528"}, {"url": "https://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753"}, {"url": "https://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589"}, {"url": "https://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa"}, {"url": "https://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone\n\nCommit 25e5cb780e62 (\"nvme-tcp: fix possible crash in write_zeroes\nprocessing\") established that blk_rq_payload_bytes() must not be read\nwithout first checking blk_rq_nr_phys_segments(), and recorded the\nresult in nvme_tcp_setup_cmd_pdu() as req->data_len. The receive side\nwas left as it was.\n\nThe two differ for REQ_OP_WRITE_ZEROES, which has no physical segments\nbut a non-zero blk_rq_bytes(), so setup leaves req->iter untouched\nwhile the receive gate lets a C2HData through and nvme_tcp_recv_data()\ncopies into whatever the previous command on that tag left there. The\ndriver-private area is zeroed only when the tag set is allocated.\n\nReproduced with a test target that leaves a residual iterator on a tag\nand then sends a C2HData for a WRITE_ZEROES command on the same tag:\n\nBUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330\nWrite of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103\n\nCPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nWorkqueue: nvme_tcp_wq nvme_tcp_io_work\nCall Trace:\n <TASK>\n dump_stack_lvl+0x53/0x70\n kasan_report+0xce/0x100\n ? _copy_to_iter+0x642/0x1330\n kasan_check_range+0x105/0x1b0\n __asan_memcpy+0x3c/0x60\n _copy_to_iter+0x642/0x1330\n ? __pfx_sock_has_perm+0x10/0x10\n ? worker_thread+0x45b/0xd10\n ? __pfx__copy_to_iter+0x10/0x10\n ? _raw_spin_lock_bh+0x83/0xe0\n ? __pfx__raw_spin_lock_bh+0x10/0x10\n __skb_datagram_iter+0xf3/0x820\n ? __pfx_simple_copy_to_iter+0x10/0x10\n ? __asan_memcpy+0x3c/0x60\n ? skb_copy_bits+0x58d/0x830\n skb_copy_datagram_iter+0x37/0x120\n nvme_tcp_recv_skb+0xa07/0x4320\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n __tcp_read_sock+0x1ab/0x810\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n ? __pfx_lock_sock_nested+0x10/0x10\n ? __pfx___tcp_read_sock+0x10/0x10\n nvme_tcp_try_recv+0x152/0x1e0\n ? __pfx_nvme_tcp_try_recv+0x10/0x10\n ? __pfx_mutex_unlock+0x10/0x10\n nvme_tcp_io_work+0x1e4/0x6c0\n ? __schedule+0x181a/0x49f0\n ? __pfx_nvme_tcp_io_work+0x10/0x10\n process_one_work+0x633/0x1030\n\nKeep the blk_rq_payload_bytes() test and add req->data_len to it. The\nold test is what rejects a C2HData naming a tag that is no longer in\nflight, because blk_update_request() zeroes rq->__data_len on\ncompletion; req->data_len and req->curr_bio are driver-private and\nsurvive completion, so they cannot stand in for it. Setup initialises\nthe iterator only when both req->curr_bio and req->data_len are set, so\nthe gate now tests the same two."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.270", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.221", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.188", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.157", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.109", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.50", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2.4", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.3", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.6.8"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:32.356Z"}}}, "cveMetadata": {"cveId": "CVE-2026-89482", "state": "PUBLISHED", "dateUpdated": "2026-10-19T08:47:32.356Z", "dateReserved": "2026-09-11T19:38:34.712Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-09-11T19:43:37.236Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/host/tcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "32ea8ce96b9bd797c59c351ce490ffd97adaa8c0", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "7ed0b61bbc145988be292c4d3ec580aebd8d2bcd", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "b36161701cb366f416afdcf70771d432a7c74753", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "6a01b58263108eaf9869bb6f82f07709240c6589", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "641ad3a30ba560f0a9a610376c568d7b75d2a2aa", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"lessThan": "3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36", "status": "affected", "version": "25e5cb780e62bde432b401f312bb847edc78b432", "versionType": "git"}, {"status": "affected", "version": "f507ae6e33cbe56c4e3fe000434fc0ecc263d098", "versionType": "git"}, {"status": "affected", "version": "b1458c16f4e26e87492e58e4d24a1873bd09232a", "versionType": "git"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.36", "versionType": "semver"}, {"lessThan": "5.7", "status": "affected", "version": "5.6.8", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/host/tcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone\n\nCommit 25e5cb780e62 (\"nvme-tcp: fix possible crash in write_zeroes\nprocessing\") established that blk_rq_payload_bytes() must not be read\nwithout first checking blk_rq_nr_phys_segments(), and recorded the\nresult in nvme_tcp_setup_cmd_pdu() as req->data_len. The receive side\nwas left as it was.\n\nThe two differ for REQ_OP_WRITE_ZEROES, which has no physical segments\nbut a non-zero blk_rq_bytes(), so setup leaves req->iter untouched\nwhile the receive gate lets a C2HData through and nvme_tcp_recv_data()\ncopies into whatever the previous command on that tag left there. The\ndriver-private area is zeroed only when the tag set is allocated.\n\nReproduced with a test target that leaves a residual iterator on a tag\nand then sends a C2HData for a WRITE_ZEROES command on the same tag:\n\nBUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330\nWrite of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103\n\nCPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nWorkqueue: nvme_tcp_wq nvme_tcp_io_work\nCall Trace:\n <TASK>\n dump_stack_lvl+0x53/0x70\n kasan_report+0xce/0x100\n ? _copy_to_iter+0x642/0x1330\n kasan_check_range+0x105/0x1b0\n __asan_memcpy+0x3c/0x60\n _copy_to_iter+0x642/0x1330\n ? __pfx_sock_has_perm+0x10/0x10\n ? worker_thread+0x45b/0xd10\n ? __pfx__copy_to_iter+0x10/0x10\n ? _raw_spin_lock_bh+0x83/0xe0\n ? __pfx__raw_spin_lock_bh+0x10/0x10\n __skb_datagram_iter+0xf3/0x820\n ? __pfx_simple_copy_to_iter+0x10/0x10\n ? __asan_memcpy+0x3c/0x60\n ? skb_copy_bits+0x58d/0x830\n skb_copy_datagram_iter+0x37/0x120\n nvme_tcp_recv_skb+0xa07/0x4320\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n __tcp_read_sock+0x1ab/0x810\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n ? __pfx_lock_sock_nested+0x10/0x10\n ? __pfx___tcp_read_sock+0x10/0x10\n nvme_tcp_try_recv+0x152/0x1e0\n ? __pfx_nvme_tcp_try_recv+0x10/0x10\n ? __pfx_mutex_unlock+0x10/0x10\n nvme_tcp_io_work+0x1e4/0x6c0\n ? __schedule+0x181a/0x49f0\n ? __pfx_nvme_tcp_io_work+0x10/0x10\n process_one_work+0x633/0x1030\n\nKeep the blk_rq_payload_bytes() test and add req->data_len to it. The\nold test is what rejects a C2HData naming a tag that is no longer in\nflight, because blk_update_request() zeroes rq->__data_len on\ncompletion; req->data_len and req->curr_bio are driver-private and\nsurvive completion, so they cannot stand in for it. Setup initialises\nthe iterator only when both req->curr_bio and req->data_len are set, so\nthe gate now tests the same two."}], "id": "CVE-2026-89482", "lastModified": "2026-10-19T09:17:41.540", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-89482", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:22:37.965026Z", "version": "2.0.3"}}]}, "published": "2026-09-11T20:19:29.730", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32ea8ce96b9bd797c59c351ce490ffd97adaa8c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ed0b61bbc145988be292c4d3ec580aebd8d2bcd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: nvme-tcp memory corruption via improper C2HData handling", "id": "2532128", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532128"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the nvme-tcp module of the Linux kernel. This vulnerability arises from improper handling of C2HData for REQ_OP_WRITE_ZEROES commands, where the system fails to adequately validate the data length. A remote attacker could exploit this by sending specially crafted C2HData, leading to a wild-memory-access. This memory corruption can cause a kernel crash, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-89482", "public_date": "2026-09-11T19:43:37Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89482\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89482\nhttps://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36\nhttps://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa\nhttps://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589\nhttps://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[25e5cb780e62bde432b401f312bb847edc78b432,b36161701cb366f416afdcf70771d432a7c74753)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[25e5cb780e62bde432b401f312bb847edc78b432,6a01b58263108eaf9869bb6f82f07709240c6589)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[25e5cb780e62bde432b401f312bb847edc78b432,641ad3a30ba560f0a9a610376c568d7b75d2a2aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[25e5cb780e62b847edc78b432,3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f507ae6e33cbe56c4e3fe000434fc0ecc263d098"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b1458c16f4e26e87492e58e4d24a1873bd09232a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.4.36,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.6.8,5.7)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "7.3-rc1"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T02:45:06.766056+00:00", "updated": "2026-09-15T23:00:16.550325+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}