{"schema":"threatline.record/2","record":{"id":"CVE-2026-53613","aliases":["GHSA-8gj5-72r3-428g"],"summary":"util-linux mount target TOCTOU allows local privilege escalation","details":"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.","categories":["Unclassified"],"product":"util-linux","vendor":"util-linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-53613","source_modified_at":"2026-10-15T15:08:26.914Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"util-linux","vendor":"util-linux","versions":[{"version":">= 2.17, <= 2.41.6","status":"affected"},{"version":">= 2.42, <= 2.42.4","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00128,"percentile":0.0222,"score_date":"2026-10-23"},"published_at":"2026-10-14T14:52:56.063Z","modified_at":"2026-10-15T15:08:26.914Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-53613","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-15T15:08:26.914Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-53613","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345eac38f41cd166c0b0","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/2c773f336134acf016e639abb6f12ba7341fe4b8","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fa8750afa0327e84b4","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0b59eb3fb8a9359ec","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14f566f1af48e3107c9","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7368187715e6a8d78","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b3344998df5ac2c2ff5","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884b632e1e956584bee9","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/a9508d216eb8977979102782672e0470cc9bf2a2","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/releases/tag/v2.41.5","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/releases/tag/v2.42.2","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/releases/tag/v2.42.4","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-15T13:11:45.430649Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-15T15:08:26.914Z","content_hash":"4c57de724f242a99179c0b4c49823610e81f90c205628c905404545ec77c1947"}}