{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53613", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-09T19:39:52.405Z", "datePublished": "2026-10-14T14:52:56.063Z", "dateUpdated": "2026-10-15T15:08:26.914Z" }, "containers": { "cna": { "title": "util-linux mount target TOCTOU allows local privilege escalation", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-367", "lang": "en", "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" } } ], "references": [ { "name": "https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g" }, { "name": "https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2" }, { "name": "https://github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345eac38f41cd166c0b0", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345eac38f41cd166c0b0" }, { "name": "https://github.com/util-linux/util-linux/commit/2c773f336134acf016e639abb6f12ba7341fe4b8", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/2c773f336134acf016e639abb6f12ba7341fe4b8" }, { "name": "https://github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fa8750afa0327e84b4", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fa8750afa0327e84b4" }, { "name": "https://github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0b59eb3fb8a9359ec", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0b59eb3fb8a9359ec" }, { "name": "https://github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14f566f1af48e3107c9", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14f566f1af48e3107c9" }, { "name": "https://github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7368187715e6a8d78", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7368187715e6a8d78" }, { "name": "https://github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b3344998df5ac2c2ff5", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b3344998df5ac2c2ff5" }, { "name": "https://github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884b632e1e956584bee9", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884b632e1e956584bee9" }, { "name": "https://github.com/util-linux/util-linux/commit/a9508d216eb8977979102782672e0470cc9bf2a2", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/commit/a9508d216eb8977979102782672e0470cc9bf2a2" }, { "name": "https://github.com/util-linux/util-linux/releases/tag/v2.41.5", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.5" }, { "name": "https://github.com/util-linux/util-linux/releases/tag/v2.42.2", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/releases/tag/v2.42.2" }, { "name": "https://github.com/util-linux/util-linux/releases/tag/v2.42.4", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/util-linux/util-linux/releases/tag/v2.42.4" } ], "affected": [ { "vendor": "util-linux", "product": "util-linux", "versions": [ { "version": ">= 2.17, <= 2.41.6", "status": "affected" }, { "version": ">= 2.42, <= 2.42.4", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-14T14:52:56.063Z" }, "descriptions": [ { "lang": "en", "value": "util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy `mount(2)` path is used without `/proc`, restricted non-root `mount` requests validate an `/etc/fstab` target before the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab `user` or `users` entry whose target has an attacker-writable ancestor can use `renameat2(RENAME_EXCHANGE)` to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over `/etc/sudoers.d`, and thereby gain root privileges. Versions 2.41.5 and 2.42.2 pin targets for the new mount API, and 2.42.4 pins legacy targets through `/proc/self/fd`; the documented legacy fallback without `/proc` remains affected." } ], "source": { "advisory": "GHSA-8gj5-72r3-428g", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-10-15T13:11:45.430649Z", "id": "CVE-2026-53613", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T15:08:26.914Z" } } ] } }