PT-2022-5490 · Grub2+9 · Grub2+9
Marco Benatto
·
Published
2022-11-15
·
Updated
2026-06-01
·
CVE-2022-2601
CVSS v3.1
8.6
High
| Vector | AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
GRUB2 (affected versions not specified)
Description
A buffer overflow was found in the
grub font construct glyph() function. A maliciously crafted pf2 font can lead to an overflow when calculating the max glyph size value, allocating a smaller than needed buffer for the glyph, which further leads to a buffer overflow and a heap-based out-of-bounds write. An attacker may use this issue to circumvent the secure boot mechanism. The vulnerability can be exploited to affect the system.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability. As a temporary workaround, consider disabling the Secure Boot feature or deleting the Microsoft SBAT to mitigate the issue.
DoS
Heap Based Buffer Overflow
Memory Corruption
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Grub2
Red Hat
Red Os
Rocky Linux
Suse
Windows