CVE-2020-21839
NixOS vulnerability analysis and mitigation

Overview

An issue was discovered in GNU LibreDWG 0.10 where crafted input leads to a memory leak in dwgdecodeeed ../../src/decode.c:3638. The vulnerability is tracked as CVE-2020-21839 (NVD).

Technical details

The vulnerability is classified as a Missing Release of Memory after Effective Lifetime (CWE-401). The issue has a CVSS v3.1 Base Score of 6.5 MEDIUM with vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (NVD, CWE).

Impact

When successfully exploited, this vulnerability can result in unauthorized ability to cause a partial denial of service through memory consumption. The memory leak occurs when processing crafted input files, potentially leading to resource exhaustion (CWE).

Mitigation and workarounds

Users should upgrade to a version newer than GNU LibreDWG 0.10. The vulnerability has been reported and tracked in the Debian security tracker (Debian).

Additional resources


SourceThis report was generated using AI

Related NixOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-61619HIGH7.5
  • NixOSNixOS
  • android
NoNoDec 01, 2025
CVE-2025-61618HIGH7.5
  • NixOSNixOS
  • android
NoNoDec 01, 2025
CVE-2025-61617HIGH7.5
  • NixOSNixOS
  • android
NoNoDec 01, 2025
CVE-2025-61610HIGH7.5
  • NixOSNixOS
  • android
NoNoDec 01, 2025
CVE-2025-61609HIGH7.5
  • NixOSNixOS
  • android
NoNoDec 01, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management