Vulnerability · Published Jan 29, 2026 · Assigned by VulnCheck
CVE-2020-37011Gnome Fonts Viewer 3.34.0 Heap Corruption
High 7.5
In plain English
A high-severity out-of-bounds write in Fonts Viewer from GNOME. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 61.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Gnome Fonts Viewer 3.34.0 contains a heap corruption vulnerability that allows attackers to trigger an out-of-bounds write by crafting a malicious TTF font file. Attackers can generate a specially crafted TTF file with an oversized pattern to exhaust memory through repeated malloc() calls and potentially crash the gnome-font-viewer process.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | gnome-font-viewer | no fix listed | DEBIAN-CVE-2020-37011 |
| Debian:13 | gnome-font-viewer | no fix listed | DEBIAN-CVE-2020-37011 |
| Debian:14 | gnome-font-viewer | no fix listed | DEBIAN-CVE-2020-37011 |
| Ubuntu:22.04:LTS | gnome-font-viewer | no fix listed | UBUNTU-CVE-2020-37011 |
| Ubuntu:24.04:LTS | gnome-font-viewer | no fix listed | UBUNTU-CVE-2020-37011 |
| Ubuntu:25.10 | gnome-font-viewer | no fix listed | UBUNTU-CVE-2020-37011 |
| Ubuntu:26.04:LTS | gnome-font-viewer | no fix listed | UBUNTU-CVE-2020-37011 |
| Ubuntu:26.10 | gnome-font-viewer | no fix listed | UBUNTU-CVE-2020-37011 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GNOME | Fonts Viewer | 3.34.0 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- ExploitDB-48803 exploit
- Gnome Official Website product
- Gnome Font Viewer App Webpage product
- VulnCheck Advisory: Gnome Fonts Viewer 3.34.0 Heap Corruption third-party-advisory