{"id":"CVE-2026-81018","title":"kernel: platform/x86: think-lmi: Free system certificate signatures (CVE-2026-81018)","summary":"A flaw was found in the Linux kernel's `think-lmi` driver. When the driver is removed, the system authentication object fails to free stored certificate signatures, leading to a memory leak. This can result in system instability or denial …","severity":"medium","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-772","vendor":"Red Hat","product":"Linux","affected":["Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < 9c28adde051fe76a7754856d0a414ab89adcaa4d","Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < abbcc0354108cf47a6055b951182bf73520d0363","Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < abca989604f60fe29d7170431f819e28ec7d868a","Linux 6.13"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T21:28:15+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81018.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81018.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-81018"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532431"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81018"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81018"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81018.mbox"},{"url":"https://git.kernel.org/stable/c/9c28adde051fe76a7754856d0a414ab89adcaa4d"},{"url":"https://git.kernel.org/stable/c/abbcc0354108cf47a6055b951182bf73520d0363"},{"url":"https://git.kernel.org/stable/c/abca989604f60fe29d7170431f819e28ec7d868a"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00159,"epssPercentile":0.04274,"ingestedAt":"2026-09-14T00:35:28.531Z","slug":"CVE-2026-81018","body":"## Overview\n\nA flaw was found in the Linux kernel's `think-lmi` driver. When the driver is removed, the system authentication object fails to free stored certificate signatures, leading to a memory leak. This can result in system instability or denial of service over time due to resource exhaustion.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81018.json)\n\n**kernel: platform/x86: think-lmi: Free system certificate signatures** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204121,"id":"CVE-2026-81018","ts":1789490231783,"field":"cvss","old":null,"new":"5.5"},{"seq":204120,"id":"CVE-2026-81018","ts":1789490231783,"field":"severity","old":"none","new":"medium"},{"seq":147195,"id":"CVE-2026-81018","ts":1789270200391,"field":"cvss","old":null,"new":"3.3"},{"seq":147194,"id":"CVE-2026-81018","ts":1789270200391,"field":"severity","old":"none","new":"low"},{"seq":108950,"id":"CVE-2026-81018","ts":1789183729702,"field":"cvss","old":null,"new":"3.3"},{"seq":108949,"id":"CVE-2026-81018","ts":1789183729702,"field":"severity","old":"none","new":"low"}]}