CVEvulnerability

CVE-2022-3775

7.1 HIGH Published 2022-12-19 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-12-19
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weaknesses
CWE-787

Description

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.

Affected configurations

• gnu grub2 (<= 2.06) • redhat enterprise linux 8.0

Related

Weakness · CWE (1)

  • CWE-787 Out-of-bounds Write weakness

References