{"id":"CVE-2026-53615","revision":"8388f10266bd4409a51a2b384d5755fa","records":[{"revision":"8388f10266bd4409a51a2b384d5755fa","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53615","aliases":[],"title":"util-linux libblkid DOS extended-partition overflow produces invalid partition metadata","description":"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.","state":0,"publishedAt":"2026-10-14T15:56:45.31+00:00","modifiedAt":"2026-10-15T15:07:57.462+00:00","affected":[{"ecosystem":"Vendor product","name":"util-linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"util-linux\",\n                    \"product\": \"util-linux\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.41.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","score":8,"severity":"HIGH"}],"references":["https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5","https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623","https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31","https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af","https://github.com/util-linux/util-linux/releases/tag/v2.41.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53615","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53615","identifiers":["CVE-2026-53615"]},"retained":false,"historicalAffected":[]}],"coverage":[]}