Is there a public PoC exploit available for CVE-2020-37011?

Yes, a public proof-of-concept exploit is available for CVE-2020-37011. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2020-37011?

Within 24 hours: Identify all systems running GNOME Fonts Viewer 3.34.0 and restrict user access to font file downloads from untrusted sources. Within 7 days: Disable or uninstall GNOME Fonts Viewer where operationally feasible, or restrict its use to trusted administrators only. Within 30 days: Monitor vendor security advisories for patch availability and prepare a deployment plan; consider migrating to alternative font management tools if the application is not mission-critical.

CVE-2020-37011

Q: What is the CVSS score of CVE-2020-37011?

CVE-2020-37011 has a CVSS 4.0 base score of 8.4 (High). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

HIGH

Out-of-bounds Write (CWE-787)

2026-01-29 disclosure@vulncheck.com

Memory Corruption Buffer Overflow

8.4

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

8.4 HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

SUSE

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Red Hat

5.0 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Re-analysis Queued

May 26, 2026 - 14:22 vuln.today

cvss_changed

CVSS changed

May 26, 2026 - 14:22 NVD

7.5 (HIGH) 8.4 (HIGH)

Analysis Generated

Mar 12, 2026 - 22:00 vuln.today

PoC Detected

Jan 29, 2026 - 17:16 vuln.today

Public exploit code

CVE Published

Jan 29, 2026 - 15:16 nvd

HIGH 7.5

DescriptionCVE.org

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 cause an infinite malloc() loop and potentially crash the gnome-font-viewer process.

AnalysisAI

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. [CVSS 7.5 HIGH]

Technical ContextAI

Classified as CWE-787 (Out-of-bounds Write). 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 cause an infinite malloc() loop and potentially crash the gnome-font-viewer process.

Affected ProductsAI

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

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

Vendor StatusVendor

SUSE

Severity: High

CVE-2020-37011 vulnerability details – vuln.today

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CVE-2020-37011

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

Vendor StatusVendor

SUSE

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External POC / Exploit Code