CVE-2022-3775

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-19 · updated 2026-06-17
Weakness: CWE-787

Description

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.

Affected products

grub2: through 2.06
Red Hat Enterprise Linux: 8.0

References

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

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