CVE-2022-2601
HIGH8.6EPSS 0.12%grub2 - security update
Published: 12/14/2022Modified: 4/28/2026
Also known as:DEBIAN-CVE-2022-2601
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.
Affected packages (4)
- Debian/grub2from 0, < 2.06-3~deb11u4
- Debian/grub2from 0, < 2.06-3~deb10u2
- Debian/grub2from 0, < 2.06-3~deb10u3
- Debian/grub2from 0, < 2.06-3~deb11u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |