{"schema":"threatline.record/2","record":{"id":"CVE-2026-93786","aliases":[],"summary":"ksmbd: preserve VFS inherited POSIX ACL mask","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: preserve VFS inherited POSIX ACL mask\n\nThe VFS initializes a child's POSIX ACL from the parent's default ACL and\nthe requested creation mode. Do not mutate the parent ACL or overwrite the\nchild's VFS-computed access and default ACLs afterwards.\n\nThis preserves restrictive ACL_MASK entries and prevents SMB object creation\nfrom widening effective permissions.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93786","source_modified_at":"2026-10-03T10:57:21.384Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"4a19bb1c45667f5a5f6eff9cf6648e0f692d046f","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"591acf171644de590cda245fd8595b473a1beb70","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"0093909becbda22b62b39b654dbc607faed59cd0","status":"affected","versionType":"git"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"e148e567a9252643baa125cb65d7ae9c2c6cf68a","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93786","source_modified_at":"2026-10-03T10:57:21.384Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","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-2026-93786","source_modified_at":"2026-10-03T10:57:21.384Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"4a19bb1c45667f5a5f6eff9cf6648e0f692d046f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93786","source_modified_at":"2026-10-03T10:57:21.384Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"591acf171644de590cda245fd8595b473a1beb70","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93786","source_modified_at":"2026-10-03T10:57:21.384Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"0093909becbda22b62b39b654dbc607faed59cd0","basis":"first unaffected version stated in the CVE record"}],"cvss":8.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00341,"percentile":0.2642,"score_date":"2026-10-23"},"published_at":"2026-09-24T16:02:19.798Z","modified_at":"2026-10-03T10:57:21.384Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93786","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-03T10:57:21.384Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93786","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/4a19bb1c45667f5a5f6eff9cf6648e0f692d046f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68a"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-03T10:57:21.384Z","content_hash":"915722ffe38c6125bb6bf07a6546607d5c6331abd363198e82c2a5b6a720e12c"}}