{"id":"CVE-2026-98117","title":"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 cachef…","summary":"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 cachef…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 < 68d459e6e609c31f96a203dd6eec60c634f155e1","Linux >= 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 < 93488ea378b4427598cace558236c110515d743b","Linux >= 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 < a67632c8c2688d6e0091529bcefe54bc5ee80e9b","Linux 6.14"],"published":"2026-09-25","updated":"2026-09-30","sourceUpdated":"2026-09-30T14:10:59.253","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98117","references":[{"url":"https://git.kernel.org/stable/c/68d459e6e609c31f96a203dd6eec60c634f155e1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/93488ea378b4427598cace558236c110515d743b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a67632c8c2688d6e0091529bcefe54bc5ee80e9b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98117.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98117"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541345"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98117"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98117"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98117.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00167,"epssPercentile":0.05861,"ingestedAt":"2026-09-25T11:06:38.821Z","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-125"],"slug":"CVE-2026-98117","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98117.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224161,"id":"CVE-2026-98117","ts":1792324967414,"field":"cvss","old":null,"new":"5.5"},{"seq":224160,"id":"CVE-2026-98117","ts":1792324967414,"field":"severity","old":"none","new":"medium"}]}