CVE-2026-4437
NixOS vulnerability analysis and mitigation

Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.


SourceNVD

Related NixOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-24660CRITICAL9.8
  • NixOSNixOS
  • LibRaw-static
NoYesApr 07, 2026
CVE-2026-24450CRITICAL9.8
  • NixOSNixOS
  • LibRaw-devel
NoYesApr 07, 2026
CVE-2026-21413CRITICAL9.8
  • NixOSNixOS
  • LibRaw-devel
NoYesApr 07, 2026
CVE-2026-39883HIGH7.3
  • PackerPacker
  • thanos
NoYesApr 08, 2026
CVE-2026-39882MEDIUM5.3
  • PrometheusPrometheus
  • frankenphp-8.3
NoYesApr 08, 2026

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