A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.
CVE-2024-45781
CVSS base score
6.7 (v3.1)
Severity
MEDIUM
Attack vector
Local
Weakness
CWE-787
Last modified
November 5, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H