CVE-2024-45780

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.

CVSS 3.1

6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2025-03-03

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

Affected

• gnu:grub2

References

• https://access.redhat.com/security/cve/CVE-2024-45780
• https://bugzilla.redhat.com/show_bug.cgi?id=2345856
• https://lists.gnu.org/archive/html/grub-devel/2025-02/msg00024.html

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