Vulnerability in Gnu Grub2

CVE-2024-56738

GNU GRUB (aka GRUB2) through 2.12 does not use a constant-time algorithm for grub_crypto_memcmp and thus allows side-channel attacks.

EPSS: 0.004 (32.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Gnu Grub2 — versions 2.00

Weakness classification (CWE)

Public proof-of-concept exploits

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

References

cve@mitre.org (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2024-56738?: CVE-2024-56738 is a medium-severity vulnerability in Gnu Grub2, classified under CWE-208. CVSS score: 5.3/10. Published 2024-12-29.
How severe is CVE-2024-56738?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2024-56738 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.