VULNERABILITY INTELLIGENCE

CVE-2022-3775

CVSS score7.1 HIGH
EPSS probability1.04%
CISA KEVNot currently listed
Published2022-12-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-787
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-787

Primary references