{"identifier":"CVE-2026-53613","cve":{"id":"CVE-2026-53613","description":"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.","published":"2026-10-14T15:17:20.410000+00:00","modified":"2026-10-16T16:00:33.533000+00:00","status":"Awaiting Analysis","score":7.0,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_version":"3.1","affected":[],"weaknesses":["CWE-367"],"references":[{"url":"https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345eac38f41cd166c0b0","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/2c773f336134acf016e639abb6f12ba7341fe4b8","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fa8750afa0327e84b4","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0b59eb3fb8a9359ec","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14f566f1af48e3107c9","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7368187715e6a8d78","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b3344998df5ac2c2ff5","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884b632e1e956584bee9","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/a9508d216eb8977979102782672e0470cc9bf2a2","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.41.5","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.42.2","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.42.4","source":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g","source":"security-advisories@github.com"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.0,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-15T13:11:45.430649Z","id":"CVE-2026-53613","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T10:22:15.247082+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00163,"percentile":0.0546,"date":"2026-10-27","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"github.com","source_url":"https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2","investigate_url":"https://investigate.aeglixmind.com/#github.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-53613","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-53613","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-53613","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}