{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80619", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.774Z", "datePublished": "2026-08-28T06:48:38.702Z", "dateUpdated": "2026-08-29T06:21:26.537Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-29T06:21:26.537Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix potential UAF in aa_replace_profiles\n\nThe function aa_replace_profiles was accessing udata->size after calling\naa_put_loaddata(udata), causing a potential UAF.\n\nFixed this by saving the size to a local variable before dropping the\nreference."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is only reachable via local write() to AppArmor policy management interfaces (/sys/kernel/security/apparmor/.load or .replace, or namespace .load/.replace under apparmorfs), which invoke policy_update() -> aa_replace_profiles(); there is no network or adjacent protocol path.\nAC:L - An attacker with policy-admin rights can trigger the bug by loading or replacing policy (including duplicate rawdata dedup paths) while concurrently removing/replacing profiles so aa_put_profile_loaddata() at the out label can drop the last pcount and schedule do_ploaddata_rmfs() before udata->size is read; the attacker controls both sides of this race.\nPR:L - aa_replace_profiles() is gated by aa_may_manage_policy(), which requires CAP_MAC_ADMIN and policy-view rights; with default unprivileged_userns_apparmor_policy=1, namespace UID 0 in an unprivileged user namespace can satisfy these without init-namespace root, matching prior AppArmor policy-load CVE scoring.\nUI:N - Exploitation requires only the attacker's own write of policy data to .load/.replace; no separate victim action, mount, or administrator interaction beyond the attacker's policy-management operation is needed.\nS:U - The UAF corrupts kernel AppArmor loaddata within the same OS security authority as the caller; it is standard kernel memory corruption/local privilege escalation, not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Reading udata->size after aa_put_profile_loaddata() is a use-after-free on struct aa_loaddata; freed heap objects can be reallocated and the size field read gives attacker-influenced kernel heap disclosure primitives per kernel CVSS UAF guidance.\nI:H - UAF on aa_loaddata enables heap grooming and corruption of adjacent kernel objects through controlled policy load/free timing, providing a well-established path to arbitrary kernel writes and local privilege escalation beyond the initial policy-admin capability.\nA:H - When the last profile reference is dropped at cleanup, the deferred free can run before the post-put size read, causing refcount corruption, kernel oops/BUG, or panic; UAF bugs are scored Availability High even when full exploitation is not attempted."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/apparmor/policy.c"], "versions": [{"version": "5ac8c355ae0013d82b3a07b49aebeadfce9b6e52", "lessThan": "9d8e47cbce7536f19c96e37d0685a042010187ee", "status": "affected", "versionType": "git"}, {"version": "5ac8c355ae0013d82b3a07b49aebeadfce9b6e52", "lessThan": "9d37dc6376e336dc4b4f39a7ad0d069aa70e9495", "status": "affected", "versionType": "git"}, {"version": "5ac8c355ae0013d82b3a07b49aebeadfce9b6e52", "lessThan": "c0f3a3fda617beeec58708720304dd026a1a4dd7", "status": "affected", "versionType": "git"}, {"version": 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{"bugzilla": {"description": "kernel: apparmor: fix potential UAF in aa_replace_profiles", "id": "2525394", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525394"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the AppArmor security module of the Linux kernel. The `aa_replace_profiles` function was susceptible to a use-after-free (UAF) vulnerability. This occurred because the function accessed data after it had been deallocated, potentially allowing an attacker to cause a denial of service or execute arbitrary code."], "name": "CVE-2026-80619", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80619\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80619\nhttps://lore.kernel.org/linux-cve-announce/2026082836-CVE-2026-80619-935d@gregkh/T"], "threat_severity": "Moderate"}

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