CVE-2022-2601
grub2 - security update
8.6
HIGH
CVSS 3.1
EPSS 0.12%
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.
How to fix CVE-2022-2601
To remediate CVE-2022-2601, upgrade the affected package to a fixed version below.
- —upgrade to 2.06-3~deb11u4 or later
- —upgrade to 2.06-3~deb10u2 or later
- —upgrade to 2.06-3~deb10u3 or later
- —upgrade to 2.06-3~deb11u4 or later
Is CVE-2022-2601 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 2.06-3~deb11u4
- from 0, < 2.06-3~deb10u2
- from 0, < 2.06-3~deb10u3
- from 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 |