What is CVE-2025-0689?

CVE-2025-0689 is a high-severity vulnerability in Gnu Grub2, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2025-03-03.

How severe is CVE-2025-0689?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2025-0689 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Gnu Grub2

CVE-2025-0689

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…

Vulnerability class: Buffer Overflow

EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

yo-yo-yo-jbo/yo-yo-yo-jbo.github.io

References

secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
secalert@redhat.com (Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2025-0689?: CVE-2025-0689 is a high-severity vulnerability in Gnu Grub2, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2025-03-03.
How severe is CVE-2025-0689?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2025-0689 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.