Description
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.
INFO
Published Date :
2025-03-03T17:14:30.632Z
Last Modified :
2025-11-20T20:00:08.161Z
Source :
redhat
AFFECTED PRODUCTS
The following products are affected by CVE-2025-0686 vulnerability.
| Vendors | Products |
|---|---|
| Gnu |
|
| Redhat |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2025-0686.
