What’s Vulnerable › Vulnerabilities

CVE-2025-1125: Grub2: fs/hfs: integer overflow may lead to heap based out-of-bounds write

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-03 · updated 2026-10-21
• Weakness: CWE-787

Description

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

• grub2: through 2.12

References

• https://access.redhat.com/security/cve/CVE-2025-1125
• https://bugzilla.redhat.com/show_bug.cgi?id=2346138
• https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html

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