CVE-2026-81018

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81018", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.813Z", "datePublished": "2026-09-11T19:43:06.080Z", "dateUpdated": "2026-10-19T08:46:43.567Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:43.567Z"}, "descriptions": [{"lang": "en", "value": "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_signature, which leak when the driver is\nremoved. Free the signatures to avoid leaking memory."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/lenovo/think-lmi.c"], "versions": [{"version": "5dcb5ef125907d09806509a9db8c6705041e0026", "lessThan": "9c28adde051fe76a7754856d0a414ab89adcaa4d", "status": "affected", "versionType": "git"}, {"version": "5dcb5ef125907d09806509a9db8c6705041e0026", "lessThan": "abbcc0354108cf47a6055b951182bf73520d0363", "status": "affected", "versionType": "git"}, {"version": "5dcb5ef125907d09806509a9db8c6705041e0026", "lessThan": "abca989604f60fe29d7170431f819e28ec7d868a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/lenovo/think-lmi.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "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": "6.13", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.3"}]}]}], "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"}], "title": "platform/x86: think-lmi: Free system certificate signatures", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/platform/x86/lenovo/think-lmi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9c28adde051fe76a7754856d0a414ab89adcaa4d", "status": "affected", "version": "5dcb5ef125907d09806509a9db8c6705041e0026", "versionType": "git"}, {"lessThan": "abbcc0354108cf47a6055b951182bf73520d0363", "status": "affected", "version": "5dcb5ef125907d09806509a9db8c6705041e0026", "versionType": "git"}, {"lessThan": "abca989604f60fe29d7170431f819e28ec7d868a", "status": "affected", "version": "5dcb5ef125907d09806509a9db8c6705041e0026", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/platform/x86/lenovo/think-lmi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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_signature, which leak when the driver is\nremoved. Free the signatures to avoid leaking memory."}], "id": "CVE-2026-81018", "lastModified": "2026-10-19T09:17:35.330", "metrics": {}, "published": "2026-09-11T20:19:10.813", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c28adde051fe76a7754856d0a414ab89adcaa4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abbcc0354108cf47a6055b951182bf73520d0363"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abca989604f60fe29d7170431f819e28ec7d868a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux Kernel: Memory leak in think-lmi driver", "id": "2532431", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532431"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["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 of service over time due to resource exhaustion."], "name": "CVE-2026-81018", "public_date": "2026-09-11T19:43:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81018\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81018\nhttps://git.kernel.org/stable/c/9c28adde051fe76a7754856d0a414ab89adcaa4d\nhttps://git.kernel.org/stable/c/abbcc0354108cf47a6055b951182bf73520d0363\nhttps://git.kernel.org/stable/c/abca989604f60fe29d7170431f819e28ec7d868a"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5dcb5ef125907d09806509a9db8c6705041e0026,9c28adde051fe76a7754856d0a414ab89adcaa4d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5dcb5ef125907d09806509a9db8c6705041e0026,abbcc0354108cf47a6055b951182bf73520d0363)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5dcb5ef125907d09806509a9db8c6705041e0026,abca989604f60fe29d7170431f819e28ec7d868a)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T20:30:17.962825+00:00", "updated": "2026-09-21T01:45:07.961536+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}