Buffer overflow in Gnu Grub2
CVE-2022-3775
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-bound…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (25.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Gnu Grub2
- Redhat Enterprise_linux — versions 8.0
- N/a Grub2 — versions All up to 2.06
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (vendor-advisory)
Frequently asked questions
- What is CVE-2022-3775?
- CVE-2022-3775 is a high-severity vulnerability in Gnu Grub2, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2022-12-19.
- How severe is CVE-2022-3775?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2022-3775 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.