{"id":"CVE-2026-81018","title":"platform/x86: think-lmi: Free system certificate signatures","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: think-lmi: Free system certificate signatures\n\nMulti-certificate support also allows the system authentication object\nto store ->signature and ->save_sign…","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":"Linux","product":"Linux","affected":["Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < 9c28adde051fe76a7754856d0a414ab89adcaa4d","Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < abbcc0354108cf47a6055b951182bf73520d0363","Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < abca989604f60fe29d7170431f819e28ec7d868a","Linux 6.13"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:46:43.567Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-81018","references":[{"url":"https://git.kernel.org/stable/c/9c28adde051fe76a7754856d0a414ab89adcaa4d"},{"url":"https://git.kernel.org/stable/c/abbcc0354108cf47a6055b951182bf73520d0363"},{"url":"https://git.kernel.org/stable/c/abca989604f60fe29d7170431f819e28ec7d868a"},{"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"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00159,"epssPercentile":0.05017,"ingestedAt":"2026-09-14T00:35:28.531Z","slug":"CVE-2026-81018","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: think-lmi: Free system certificate signatures\n\nMulti-certificate support also allows the system authentication object\nto store ->signature and ->save_signature, which leak when the driver is\nremoved. Free the signatures to avoid leaking memory.\n\n## Affected\n\n- `Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < 9c28adde051fe76a7754856d0a414ab89adcaa4d`\n- `Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < abbcc0354108cf47a6055b951182bf73520d0363`\n- `Linux >= 5dcb5ef125907d09806509a9db8c6705041e0026 < abca989604f60fe29d7170431f819e28ec7d868a`\n- `Linux 6.13`\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 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81018.json)","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"}]}