CVE-2020-37011
gnome-font-viewer: Gnome Fonts Viewer: Denial of Service via malicious TTF font file
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 29, 2026
Updated · July 3, 2026
Description
A flaw was found in Gnome Fonts Viewer. An attacker can exploit this vulnerability by crafting a malicious TrueType Font (TTF) file with an oversized pattern. This can trigger a heap corruption, leading to an out-of-bounds write and an infinite memory allocation loop. Successful exploitation can cause the application to crash, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
To mitigate this issue, avoid opening untrusted TrueType Font (TTF) files with Gnome Fonts Viewer. If the Gnome Fonts Viewer application is not required, it can be removed. Removing gnome-font-viewer may also remove other GNOME desktop components if they depend on it, potentially impacting graphical desktop functionality. Server installations without a graphical environment are not affected.
CVSS / CWE
CVSS 3.1 · 5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE-787 · Out-of-bounds Write