CVE-2025-1125: GNU GRUB2

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculation to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result the hfsplus_open_compressed_real() function will write past of the internal buffer length. This flaw may be leveraged to corrupt grub's internal critical data and may result in arbitrary code execution by-passing secure boot protections.

Affected products

• GNU GRUB2: up to and including 2.12

Published 2025-03-03. Last modified 2026-06-30.