{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98117", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.317Z", "datePublished": "2026-09-25T10:36:02.319Z", "dateUpdated": "2026-10-19T09:14:09.508Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:14:09.508Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: Fix potential UAF/KASAN warning\n\nCurrently, trace_cachefiles_coherency() is being passed a pointer to a\n__be64 lain over the coherency data in struct cachefiles_xattr so that it\ncan display the first 8 bytes. However, the data is of variable length and\ncould even be 0 bytes. This could lead to a UAF or KASAN warning.\n\nFix this by making sure the buffer has room for at least 8 bytes and that\nthose 8 bytes are pre-cleared.\n\nFurther, those bytes are not 8-byte aligned, so fix the tracepoint to\nextract the data as four 2-byte words (they are 2-byte aligned) and\nreassemble the __be64. The compiler will convert this into a single 8-byte\nload where the CPU supports it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cachefiles/xattr.c", "include/trace/events/cachefiles.h"], "versions": [{"version": "229105e5cfd9832a9ef1368c96e0098ec3a5fbf0", "lessThan": "68d459e6e609c31f96a203dd6eec60c634f155e1", "status": "affected", "versionType": "git"}, {"version": "229105e5cfd9832a9ef1368c96e0098ec3a5fbf0", "lessThan": "93488ea378b4427598cace558236c110515d743b", "status": "affected", "versionType": "git"}, {"version": "229105e5cfd9832a9ef1368c96e0098ec3a5fbf0", "lessThan": "a67632c8c2688d6e0091529bcefe54bc5ee80e9b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/cachefiles/xattr.c", "include/trace/events/cachefiles.h"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "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": "6.14", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/68d459e6e609c31f96a203dd6eec60c634f155e1"}, {"url": "https://git.kernel.org/stable/c/93488ea378b4427598cace558236c110515d743b"}, {"url": "https://git.kernel.org/stable/c/a67632c8c2688d6e0091529bcefe54bc5ee80e9b"}], "title": "cachefiles: Fix potential UAF/KASAN warning", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: cachefiles: Fix potential UAF/KASAN warning", "id": "2541345", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541345"}, "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-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncachefiles: Fix potential UAF/KASAN warning\nCurrently, trace_cachefiles_coherency() is being passed a pointer to a\n__be64 lain over the coherency data in struct cachefiles_xattr so that it\ncan display the first 8 bytes. However, the data is of variable length and\ncould even be 0 bytes. This could lead to a UAF or KASAN warning.\nFix this by making sure the buffer has room for at least 8 bytes and that\nthose 8 bytes are pre-cleared.\nFurther, those bytes are not 8-byte aligned, so fix the tracepoint to\nextract the data as four 2-byte words (they are 2-byte aligned) and\nreassemble the __be64. The compiler will convert this into a single 8-byte\nload where the CPU supports it.", "A flaw was found in the Linux kernel's cachefiles subsystem. When processing cache coherency trace events, the system reads fixed-size data from a buffer that may be empty or shorter than expected. A local user could exploit this flaw to trigger an out-of-bounds memory read, resulting in a system crash and denial of service (DoS) or potential information disclosure."], "name": "CVE-2026-98117", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98117\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98117\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98117.mbox"], "threat_severity": "Moderate"}

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