CVE-2022-2601: Fedoraproject Fedora

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 37 only
• GNU GRUB2: up to and including 2.06
• Red Hat Enterprise Linux Eus: version 9.0 only
• Red Hat Enterprise Linux For Power Little Endian Eus: version 9.0 only
• Red Hat Enterprise Linux Server Aus: version 8.2 only
• Red Hat Enterprise Linux Server For Power Little Endian Update Services For SAP Solutions: version 8.1 only; version 8.2 only; version 9.0 only
• Red Hat Enterprise Linux Server Tus: version 8.2 only
• Red Hat Enterprise Linux Server Update Services For SAP Solutions: version 8.1 only; version 8.2 only; version 9.0 only

Published 2022-12-14. Last modified 2026-06-17.