How severe is CVE-2025-0689?

This vulnerability has a severity rating of MEDIUM with a CVSS score of 6.4 out of 10.

What type of vulnerability is CVE-2025-0689?

This is classified as CWE-120, which is a common weakness in software security.

CVE-2025-0689 - MEDIUM Severity | CVSS 6.4

Vulnerability 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.

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