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.

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

EPSS: 0.004 (33.7th percentile) — read the EPSS interpretation.

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.

Affected products

Gnome Fonts Viewer — versions 3.34.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (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.