Buffer overflow in GNOME Fonts Viewer
CVE-2020-37011
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- GNOME Fonts Viewer — versions 3.34.0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48803 (exploit)
- help.gnome.org/ (product)
- apps.gnome.org/FontViewer/ (product)
- www.vulncheck.com/advisories/gnome-fonts-viewer-heap-corruption (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37011?
- CVE-2020-37011 is a high-severity vulnerability in GNOME Fonts Viewer, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-01-29.
- How severe is CVE-2020-37011?
- High severity. CVSS v3 base score is 7.5 out of 10.