{"schema":"threatline.record/2","record":{"id":"CVE-2026-93811","aliases":[],"summary":"ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling\n\n1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data\n   which only freed n.data, skipping kfree(acl.sd_buf) and leaking\n   the buffer. Zero-initialize struct xattr_ntacl acl, reorder error\n   labels to out_free to release acl.sd_buf on all error paths.\n\n2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code\n   returned success without freeing sd_buf and left stale *pntsd.\n   Set rc = -EINVAL before jumping to out_free to return error code and\n   free buffer.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"cb69d4d6f709f87c94afa28ae64c501576692171","lessThan":"f46a70a082bdbfecbe074af8a719c26c4deb58c6","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"86c2625fb9863139b359805fc6be1e31edbd3d65","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"edc17db83085624a2b1bacf6a4521d7f15571737","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"c3836f55e0dab96314774215e12d87f63fa919f2","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"6e6329322ad733c5b23555c609353841560b26bc","status":"affected","versionType":"git"},{"version":"8f0541186e9ad1b62accc9519cc2b7a7240272a7","lessThan":"d708a36634bb7b6f94d0e76d587d2ec50b2b93b5","status":"affected","versionType":"git"},{"version":"6e8f4abf584253cbaa596ea4ad13110cf61cd4c9","status":"affected","versionType":"git"},{"version":"8e33102309bd6839b2e2e158f93a7b378cb4655d","status":"affected","versionType":"git"},{"version":"5.15.62","lessThan":"5.15.222","status":"affected","versionType":"semver"},{"version":"5.18.18","lessThan":"5.19","status":"affected","versionType":"semver"},{"version":"5.19.2","lessThan":"5.20","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"86c2625fb9863139b359805fc6be1e31edbd3d65","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"6e6329322ad733c5b23555c609353841560b26bc","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"5.15.222","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"5.19","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","source_modified_at":"2026-10-03T10:57:43.607Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"5.20","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00173,"percentile":0.06359,"score_date":"2026-10-23"},"published_at":"2026-09-24T16:02:47.745Z","modified_at":"2026-10-03T10:57:43.607Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93811","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-03T10:57:43.607Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93811","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-03T10:57:43.607Z","content_hash":"c5913ff523ab5253e8e34c4062f22c561a7c660217a326c705a3fc6d0cae8aef"}}