No exploitation reported

CVE-2022-3775

No exploitation reported by the sources we read.

Published2022-12-19
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2022-12-1920:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-3775?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-3775?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Gnu grub2

Branch	Affected	Fixed in	Source
2.6	≤ 2.06	no fix published	NVD

Redhat enterprise linux

Branch	Affected	Fixed in	Source
8.0	= 8.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

grub2-toolsAlmaLinux:9all versions · fixed in 1:2.06-46.el9_1.3.almaand 14 other packages
grub2-toolsAlmaLinux:8all versions · fixed in 1:2.02-142.el8_7.1.almaand 17 other packages

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-05-27
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.12025-05-20
NVDCVSS 3.17.1read 2026-10-23
CISA-ADPweakness (CWE)CWE-7872025-05-20
CNAweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score1.0 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Published: 2022-12-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-3775?

Is CVE-2022-3775 actively exploited?

Active exploitation of CVE-2022-3775 has not been confirmed. Its EPSS score was 1.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-3775?

CVE-2022-3775 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

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