CVE-2024-56738: GNU GRUB2

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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

Affected products

• GNU GRUB2: up to and including 2.12

Published 2024-12-29. Last modified 2026-06-17.