{"schema":"threatline.record/2","record":{"id":"CVE-2026-99052","aliases":[],"summary":"selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts\n\nWhen an NFSv4 filesystem exported with security_label is mounted a\nsecond time, sget_fc() returns the existing superblock and\nnfs_get_root() calls security_sb_set_mnt_opts() again on it. Since the\nsuperblock is already SB_INITIALIZED, selinux_set_mnt_opts() takes an\nearly exit without setting SECURITY_LSM_NATIVE_LABELS in\n*set_kern_flags. nfs_get_root() then sees kflags without\nSECURITY_LSM_NATIVE_LABELS set and clears NFS_CAP_SECURITY_LABEL on\nthe shared nfs_server, silently disabling per-file labeling for both\nthe new and the original mount.\n\nCommit 3815a245b501 (\"security/selinux: fix SECURITY_LSM_NATIVE_LABELS\non reused superblock\") fixed the same problem in\nselinux_sb_clone_mnt_opts().  The reused-superblock path for a plain\nsecond mount now goes through sb_set_mnt_opts rather than\nsb_clone_mnt_opts, so it needs the same treatment: on both\nSE_SBINITIALIZED early exits, set SECURITY_LSM_NATIVE_LABELS in\n*set_kern_flags when the superblock was already using\nSECURITY_FS_USE_NATVE.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99052","source_modified_at":"2026-10-23T12:22:34.168Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864","lessThan":"a545def625860d4ccedc14fe45e884a62a041cef","status":"affected","versionType":"git"},{"version":"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864","lessThan":"a6da93c625b3557dd23ff6db45d2d1bafeae1565","status":"affected","versionType":"git"},{"version":"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864","lessThan":"5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b","status":"affected","versionType":"git"},{"version":"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864","lessThan":"c997832414f1d846de0a1fa38d7d4f62ba2ea917","status":"affected","versionType":"git"},{"version":"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864","lessThan":"28b7260548af3d35773477993ad4e4de41578dd7","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99052","source_modified_at":"2026-10-23T12:22:34.168Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.11","status":"affected"},{"version":"0","lessThan":"3.11","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99052","source_modified_at":"2026-10-23T12:22:34.168Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99052","source_modified_at":"2026-10-23T12:22:34.168Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"28b7260548af3d35773477993ad4e4de41578dd7","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:22:34.168Z","modified_at":"2026-10-23T12:22:34.168Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99052","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:22:34.168Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/a545def625860d4ccedc14fe45e884a62a041cef"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a6da93c625b3557dd23ff6db45d2d1bafeae1565"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c997832414f1d846de0a1fa38d7d4f62ba2ea917"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/28b7260548af3d35773477993ad4e4de41578dd7"}],"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":"2026-10-23T12:22:34.168Z","content_hash":"cb12425a69162dd5883edb6fa8e959c5df06b081e66603072e6c18acd0b9d916"}}