Heap Corruption Vulnerability in Gnome Fonts Viewer by Gnome
CVE-2020-37011

7.5NONE

Key Information:

Vendor

Gnome
Status
Fonts Viewer
Vendor
CVE Published:
29 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-37011?

Gnome Fonts Viewer version 3.34.0 contains a heap corruption flaw that could be exploited by attackers to perform out-of-bounds writes. By crafting a malicious TTF font file with an oversized pattern, attackers can induce an infinite malloc() loop, potentially leading to the crash of the gnome-font-viewer process. This vulnerability poses a risk to users and systems relying on the functionality of Gnome Fonts Viewer, making it essential to apply mitigations or updates as advised by security advisories.

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Deploy the Patch

Affected Version(s)

Fonts Viewer 3.34.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-37011 - Proof of Concept

References

https://www.exploit-db.com/exploits/48803
exploit
https://help.gnome.org/
product
https://apps.gnome.org/FontViewer/
product

CVSS V4

Score:
Severity:
NONE
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Cody Winkler
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