What’s Vulnerable › Vulnerabilities

CVE-2020-37011: Gnome Fonts Viewer 3.34.0 Heap Corruption

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-29 · updated 2026-06-17
• Weakness: CWE-787

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 products

• GNOME Fonts Viewer: 3.34.0

References

• https://apps.gnome.org/FontViewer/
• https://help.gnome.org/
• https://www.exploit-db.com/exploits/48803
• https://www.vulncheck.com/advisories/gnome-fonts-viewer-heap-corruption
• https://www.exploit-db.com/exploits/48803

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