CVE-2022-3775

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.

Score

CVSS 3.1 7.1 High

Status

Modified - secalert@redhat.com

Published

2022-12-19

Last modified

2026-05-27

Weaknesses

CWE-787

Affected products

• Grub2 (Gnu)
• Enterprise Linux (Redhat)

References

• https://access.redhat.com/security/cve/cve-2022-3775
• https://security.gentoo.org/glsa/202311-14