Out-of-bounds Write Affecting grub2-i386-pc package, versions <2.06-150400.11.55.2


Severity

Recommended
high

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-SLES154-GRUB2I386PC-8738720
  • published20 Feb 2025
  • disclosed19 Feb 2025

Introduced: 19 Feb 2025

CVE-2025-0686  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 grub2-i386-pc to version 2.06-150400.11.55.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-i386-pc package and not the grub2-i386-pc package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1