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Vulnerability record · CVE-2022-2601 · published 14 December 2022

CVE-2022-2601: Gnu grub2 heap-based buffer overflow vulnerability

Gnu · Grub2

A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.

8.6 CVSS 3.1 High EPSS 0.51% · top 58.5% CWE-122 · Heap-based buffer overflowCWE-787 · Out-of-bounds write
8.6CVSS 3.1 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.

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

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0 Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202311-14
https://security.netapp.com/advisory/ntap-20230203-0004/
https://arstechnica.com/security/2024/08/a-patch-microsoft-spent-2-years-preparing-is-making-a-mess-for-some-linux-users
https://bugzilla.redhat.com/show_bug.cgi?id=2112975#c0 Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202311-14
https://security.netapp.com/advisory/ntap-20230203-0004/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-2601), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.