{"id":"CVE-2026-89485","title":"kernel: lockd: pin next file across nlm_inspect_file lock-drop (CVE-2026-89485)","summary":"A flaw was found in the `lockd` component of the Linux kernel. This use-after-free vulnerability occurs in the `nlm_traverse_files()` function when a file's memory is prematurely released while an iterator still holds a pointer to it. A re…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T21:23:38+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89485.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89485.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89485"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532183"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89485"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89485"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89485.mbox"},{"url":"https://git.kernel.org/stable/c/e3c413f789eaf0170275c7eba523ead73d963f30"},{"url":"https://git.kernel.org/stable/c/08a455f87b14c7ff22ae3fdadda62a796a3a5572"},{"url":"https://git.kernel.org/stable/c/550c19222c7132c888e23c9d89079ba1c9bc4cca"},{"url":"https://git.kernel.org/stable/c/350087f231c11efcd288c310707c40eab63ca583"},{"url":"https://git.kernel.org/stable/c/c24bdb7df2f34bdc38ca8a73796f5acb40f1830c"},{"url":"https://git.kernel.org/stable/c/41f0a6d31615fcae261bf28a0aa50050dc93a401"},{"url":"https://git.kernel.org/stable/c/e999a88133654c6dfc68487fb49da5f20dfa2d4f"},{"url":"https://git.kernel.org/stable/c/526c49cff3f72c3ec74752016380c7567040581b"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00704,"epssPercentile":0.51477,"scores":{"vendor":7,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.452Z","slug":"CVE-2026-89485","body":"## Overview\n\nA flaw was found in the `lockd` component of the Linux kernel. This use-after-free vulnerability occurs in the `nlm_traverse_files()` function when a file's memory is prematurely released while an iterator still holds a pointer to it. A remote attacker could potentially exploit this to cause system instability or a denial of service (DoS) by triggering a concurrent file release during a specific unlock window.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89485.json)\n\n**kernel: lockd: pin next file across nlm_inspect_file lock-drop** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":206959,"id":"CVE-2026-89485","ts":1789749718842,"field":"cvss","old":"9.8","new":"7"},{"seq":206958,"id":"CVE-2026-89485","ts":1789749718842,"field":"severity","old":"critical","new":"high"},{"seq":198018,"id":"CVE-2026-89485","ts":1789384321404,"field":"cvss","old":"5.3","new":"9.8"},{"seq":198017,"id":"CVE-2026-89485","ts":1789384321404,"field":"severity","old":"medium","new":"critical"},{"seq":183525,"id":"CVE-2026-89485","ts":1789356675729,"field":"cvss","old":"9.8","new":"5.3"},{"seq":183524,"id":"CVE-2026-89485","ts":1789356675729,"field":"severity","old":"critical","new":"medium"},{"seq":153268,"id":"CVE-2026-89485","ts":1789285349813,"field":"cvss","old":null,"new":"9.8"},{"seq":153267,"id":"CVE-2026-89485","ts":1789285349813,"field":"severity","old":"none","new":"critical"},{"seq":147610,"id":"CVE-2026-89485","ts":1789270211586,"field":"cvss","old":null,"new":"5.3"},{"seq":147609,"id":"CVE-2026-89485","ts":1789270211586,"field":"severity","old":"none","new":"medium"},{"seq":109374,"id":"CVE-2026-89485","ts":1789183731660,"field":"cvss","old":null,"new":"5.3"},{"seq":109373,"id":"CVE-2026-89485","ts":1789183731660,"field":"severity","old":"none","new":"medium"}]}