Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Grub2 | <= 2.12 |
| Redhat | Openshift Container Platform | 4.0 |
| Redhat | Enterprise Linux | 7.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2025-0678Broken Link
- https://bugzilla.redhat.com/show_bug.cgi?id=2346118Issue Tracking
FAQ
What is CVE-2025-0678?
CVE-2025-0678 is a vulnerability with a CVSS score of 7.8 (HIGH). 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, how...
How severe is CVE-2025-0678?
CVE-2025-0678 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-0678?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Grub2, Redhat Openshift Container Platform, Redhat Enterprise Linux.