{"schema":"threatline.record/2","record":{"id":"CVE-2026-53615","aliases":["GHSA-h4rw-gv36-wmp5"],"summary":"util-linux libblkid DOS extended-partition overflow produces invalid partition metadata","details":"util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.","categories":["Unclassified"],"product":"util-linux","vendor":"util-linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-53615","source_modified_at":"2026-10-15T15:07:57.462Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"util-linux","vendor":"util-linux","versions":[{"version":"< 2.41.4","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00178,"percentile":0.06956,"score_date":"2026-10-23"},"published_at":"2026-10-14T15:56:45.310Z","modified_at":"2026-10-15T15:07:57.462Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-53615","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-15T15:07:57.462Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-53615","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-h4rw-gv36-wmp5","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/util-linux/util-linux/releases/tag/v2.41.4","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":"partial","assessed_at":"2026-10-14T16:11:25.315520Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-15T15:07:57.462Z","content_hash":"0c7f3f480b3512ad527e07559d430de277d97c6cfe15ce097669b93c431b284e"}}