{"id":"CVE-2026-99052","revision":"525e1d8ecf964a3eb972cce6a48abb44","records":[{"revision":"525e1d8ecf964a3eb972cce6a48abb44","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-99052","aliases":[],"title":"selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts","description":"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.","state":0,"publishedAt":"2026-10-23T12:22:34.168+00:00","modifiedAt":"2026-10-23T12:22:34.168+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"security/selinux/hooks.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864\",\n                            \"lessThan\": \"a545def625860d4ccedc14fe45e884a62a041cef\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864\",\n                            \"lessThan\": \"a6da93c625b3557dd23ff6db45d2d1bafeae1565\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864\",\n                            \"lessThan\": \"5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864\",\n                            \"lessThan\": \"c997832414f1d846de0a1fa38d7d4f62ba2ea917\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864\",\n                            \"lessThan\": \"28b7260548af3d35773477993ad4e4de41578dd7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"security/selinux/hooks.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/a545def625860d4ccedc14fe45e884a62a041cef","https://git.kernel.org/stable/c/a6da93c625b3557dd23ff6db45d2d1bafeae1565","https://git.kernel.org/stable/c/5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b","https://git.kernel.org/stable/c/c997832414f1d846de0a1fa38d7d4f62ba2ea917","https://git.kernel.org/stable/c/28b7260548af3d35773477993ad4e4de41578dd7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99052","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99052","identifiers":["CVE-2026-99052"]},"retained":false,"historicalAffected":[]}],"coverage":[]}