Description (CNA)
A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs filesystem 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 grub_romfs_read_symlink() may cause out-of-bounds writes when the calling grub_disk_read() function. This issue may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution by-passing secure boot protections.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 0 through 2.12 |
| Red Hat / Red Hat Enterprise Linux 10 | unaffected |
| Red Hat / Red Hat Enterprise Linux 7 | unaffected |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected |
| Red Hat / Red Hat OpenShift Container Platform 4 | unaffected |
| Red Hat / Red Hat OpenShift Container Platform 4 | unaffected |
CWE
CWE-787
References
- https://access.redhat.com/security/cve/CVE-2025-0686
- https://bugzilla.redhat.com/show_bug.cgi?id=2346121
- https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html
ADP enrichment
No English description supplied.
No references supplied.