CVE-2025-0678 (GCVE-0-2025-0678)

Vulnerability from cvelistv5 – Published: 2025-03-03 17:05 – Updated: 2026-11-05 14:46
VLAI
Title
Grub2: squash4: integer overflow may lead to heap based out-of-bounds write when reading data
Summary
A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs 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 direct_read() will perform a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution, by-passing secure boot protections.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-04 16:15 UTC
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
redhat CNA
References
Impacted products
Date Public
2025-02-18 18:00
Show details on NVD website
To clipboard 

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