CVE-2022-3775

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2022-12-19. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

December 19, 2022

Last Modified

May 27, 2026

References (4)

Vendor Advisories for CVE-2022-3775(7)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntushim-signed (1.51.3+15.7-0ubuntu1) @ jammy2026-05-25ubuntu
redhatgrub2-1:2.06-46.el9_1.32023-02-14redhat
redhatgrub2-1:2.02-142.el8_7.12023-01-09redhat
redhatgrub2-1:2.02-99.el8_4.102023-01-09redhat
redhatgrub2-1:2.02-123.el8_6.122023-01-09redhat
redhatgrub2-1:2.06-27.el9_0.122022-12-13redhat
redhatgrub2-1:2.02-87.el8_2.112022-12-06redhat
redhatgrub2-1:2.02-87.el8_1.112022-11-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 117 total refreshes for this CVE.

  1. 2026-07-26 14:52 UTCEPSS rescore
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  22. 2026-06-28 11:19 UTCOSV refresh
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  54. 2026-06-10 21:17 UTCOSV refresh
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Frequently asked(5)

What is CVE-2022-3775?
CVE-2022-3775 is a high vulnerability published on December 19, 2022. 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…
When was CVE-2022-3775 disclosed?
CVE-2022-3775 was first published in the National Vulnerability Database on December 19, 2022, with the most recent update on May 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-3775 actively exploited?
CVE-2022-3775 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 44.9% of all scored CVEs.
What is the CVSS score of CVE-2022-3775?
CVE-2022-3775 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2022-3775?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-3775, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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