CVEvulnerability

CVE-2025-0686

6.4 MEDIUM Published 2025-03-03 Modified 2026-10-21 Official page ↗
Status
Modified
Published
2025-03-03
Last modified
2026-10-21
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.4 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
6.4 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-787

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.

Affected configurations

• gnu grub2 (<= 2.12)

Related

Weakness · CWE (1)

  • CWE-787 Out-of-bounds Write weakness

References