CVE-2025-0677

Name of the Vulnerable Software and Affected Versions grub2 (affected versions not specified)

Description A flaw was found in grub2. When performing a symlink lookup, the grub's UFS module checks the inode's data size to allocate the internal buffer to read the file content, however, it fails to check if the symlink data size has overflown. When this occurs, grub malloc() may be called with a smaller value than needed. When further reading the data from the disk into the buffer, the grub ufs lookup symlink() function will write past the end of the allocated size. An attack can leverage this by crafting a malicious filesystem, and as a result, it will corrupt data stored in the heap, allowing for arbitrary code execution used to bypass secure boot mechanisms.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.