CVE-2024-45780: GNU GRUB2

Medium severity, CVSS 6.7. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in grub2. When reading tar files, grub2 allocates an internal buffer for the file name. However, it fails to properly verify the allocation against possible integer overflows. It's possible to cause the allocation length to overflow with a crafted tar file, leading to a heap out-of-bounds write. This flaw eventually allows an attacker to circumvent secure boot protections.

Affected products

• GNU GRUB2: up to and including 2.12

Published 2025-03-03. Last modified 2026-06-29.