VULNERABILITY INTELLIGENCE

CVE-2025-0685

CVSS score6.4 MEDIUM
EPSS probability0.29%
CISA KEVNot currently listed
Published2025-03-03
Last modified2026-10-21
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Description

A flaw was found in grub2. When reading data from a jfs filesystem, grub's jfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly 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_jfs_lookup_symlink() function will write past the internal buffer length during grub_jfs_read_file(). This issue can be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution, by-passing secure boot protections.

Weakness classification

  • secalert@redhat.com: CWE-787

Primary references