CVE-2025-0678

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.

Score
CVSS 3.1 7.8 High
Status
Modified - secalert@redhat.com
Published
2025-03-03
Last modified
2026-10-21
Weaknesses
CWE-190

Affected products

References

 
 
© AVABIS GmbH privacypolicy about