CVE•Published 2022-12-14•Modified 2026-05-27•1 article on news•6 live references•NVD data

CVE-2022-2601Gnu · Grub2

Vulnerability data via NVD (ingested)

CVSS v3.1

8.6

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 81% of all CVEs

Weaknesses (CWE)

CWE-122Heap-based Buffer Overflow CWE-787Out-of-bounds Write

Description

A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.

Timeline

Published 2022-12-14

Modified 2026-05-27

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2022-2601

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Gnu Grub2"

All exposed Gnu Grub2 instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Grub2"

HTTP body or banner mentions "Grub2" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2022-2601