{"id":"CVE-2025-0678","details":"A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the direct_read() will perform a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution, by-passing secure boot protections.","modified":"2026-04-10T05:20:19.378376Z","published":"2025-03-03T17:15:14.053Z","related":["SUSE-SU-2025:01961-1","SUSE-SU-2025:0586-1","SUSE-SU-2025:0587-1","SUSE-SU-2025:0588-1","SUSE-SU-2025:0607-1","SUSE-SU-2025:0629-1","SUSE-SU-2025:20511-1","SUSE-SU-2025:20863-1","openSUSE-SU-2025:14822-1"],"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2025-0678"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2346118"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-0678.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"2.12"}]},{"events":[{"introduced":"0"},{"last_affected":"4.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}