{"id":"CVE-2026-98994","revision":null,"records":[{"revision":"d0f172f2aed044289f0fa09f7882f925","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-98994","aliases":[],"title":"statmount: read the parent of an unmounted mount under mount_lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nstatmount: read the parent of an unmounted mount under mount_lock\n\nstatmount_mnt_basic() reads the ids of the parent through m->mnt_parent\nwith namespace_sem held for reading. That's fine for a mount that is\nin a namespace. Everything above it is pinned by that namespace.\n\nSTATMOUNT_BY_FD also accepts a file descriptor on a mount that has\nbeen unmounted on purpose and that only the file descriptor keeps alive.\nIf that mount stayed attached to its parent when it was unmounted the\nparent is unmounted as well and nothing pins it for the child.\n\nThe final mntput() unmounts the children under mount_lock alone and\nfrees the parent afterwards. Concurrently, statmount_mnt_basic() reads\nm->mnt_parent twice while that can happen and can easily dereference a\nmount that's already gone.\n\nRead the parent of an unmounted mount under mount_lock. The parent\ncan't be put while it is held and both ids come from the same mount. A\nmounted mount's parent is pinned by the namespace and a mount can't\nleave its namespace while namespace_sem is held, so the common case\ntakes no global lock.","state":0,"publishedAt":"2026-10-23T12:20:13.244+00:00","modifiedAt":"2026-10-23T12:20:13.244+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                        \"fs/namespace.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0e5032237ee5530147fbdf33134297e1490d5ec3\",\n                            \"lessThan\": \"98fc6c7b6ca676157d2c780bd0a537b2c10fe08f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0e5032237ee5530147fbdf33134297e1490d5ec3\",\n                            \"lessThan\": \"bb46094057520304073130920c223451c2a694a7\",\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                        \"fs/namespace.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\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/98fc6c7b6ca676157d2c780bd0a537b2c10fe08f","https://git.kernel.org/stable/c/bb46094057520304073130920c223451c2a694a7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98994","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98994","identifiers":["CVE-2026-98994"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-28T06:06:22.8608156+00:00","complete":true,"records":1760,"lastAttemptAt":"2026-10-28T06:06:22.8608156+00:00","lastSuccessAt":"2026-10-28T06:06:22.9998161+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:22.9998165+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-d2186f400c54d65f61687f78bb1a00d184d2e215877d0194d7ed70caee809a44-445379b0c53fd1f8d253c8a14ff9901d849a8a0a854aa4f1d7de3dcccb1e5f13","complete":true,"records":415520,"lastAttemptAt":"2026-10-28T06:06:22.1141459+00:00","lastSuccessAt":"2026-10-28T06:06:22.0953342+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:22.1141459+00:00","snapshotPublishedAt":"2026-10-28T05:18:29+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-224e28a69c964439b5d4139e8be635bf","complete":false,"records":11190,"lastAttemptAt":"2026-10-28T06:17:58.8698901+00:00","lastSuccessAt":"2026-10-28T06:17:58.866+00:00","error":"18 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-10-28T06:17:58.866+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":6482,"expectedIdentifiers":13514,"failedIdentifiers":18},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-28T06:06:22.8608156+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-28T06:06:22.8608156+00:00","lastSuccessAt":"2026-10-28T06:06:23.0013193+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:23.0013198+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-8d16a738328646698f9217d8ea11893c","complete":true,"records":13449,"lastAttemptAt":"2026-10-28T06:06:25.7470666+00:00","lastSuccessAt":"2026-10-27T22:48:29.491+00:00","error":null,"lastVerifiedAt":"2026-10-27T22:48:29.491+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13514,"expectedIdentifiers":13514,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-f7cb12508d9e6a348c8a60f772ed85529cc80cd2ff853da1099b57754b20e943","complete":true,"records":9790,"lastAttemptAt":"2026-10-28T06:06:22.7444146+00:00","lastSuccessAt":"2026-10-27T21:49:03.9756799+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:22.7444146+00:00","snapshotPublishedAt":"2026-10-27T21:48:11+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-72e5e79de0026dd0562d40734074a2236a06886643d67182b8381eaee757dbf7","complete":true,"records":1966,"lastAttemptAt":"2026-10-28T06:06:22.1709566+00:00","lastSuccessAt":"2026-10-27T21:46:38.0277323+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:22.1709566+00:00","snapshotPublishedAt":"2026-10-27T21:18:15+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-3a5b306d60fc44677a03a8afc99d87e6c5402770ef68d560f94a8c3ad3802b75","complete":true,"records":3001,"lastAttemptAt":"2026-10-28T06:06:22.7572796+00:00","lastSuccessAt":"2026-10-27T16:45:49.0050993+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:22.7572796+00:00","snapshotPublishedAt":"2026-10-27T16:33:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-5f3141cf1b985319fe2c9d9b1b1aab03f442c3a2272590c3c2e44d5d3d31bfb3","complete":true,"records":230854,"lastAttemptAt":"2026-10-28T06:06:22.6466834+00:00","lastSuccessAt":"2026-10-28T02:53:16.9493663+00:00","error":null,"lastVerifiedAt":"2026-10-28T06:06:22.6466834+00:00","snapshotPublishedAt":"2026-10-28T02:33:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}