CVE-2025-0689 Information

Description

When reading data from disk the grub’s UDF filesystem module utilizes the user controlled data length metadata to allocate its internal buffers. In certain scenarios while iterating through disk sectors it assumes the read size from the disk is always smaller than the allocated buffer size which is not guaranteed. A crafted filesystem image may lead to a heap-based buffer overflow resulting in critical data to be corrupted resulting in the risk of arbitrary code execution by-passing secure boot protections.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Reference

https://access.redhat.com/security/cve/CVE-2025-0689 https://bugzilla.redhat.com/show_bug.cgi?id=2346122

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.4