All vulnerabilities
CVE-2026-110449

Nix before 2.35.3 and Lix before 2.95.4 have an integer overflow and resultant out-of-bounds write when evaluating untrusted expressions because list allocation is mishandled.

NixOS Nix
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.25%Chance of exploitation activity in the next 30 days, higher than 15% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.28.8Also 2.30.6, 2.31.6 and 2 moreCVE List
Published14 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Affected versions 5

  • Nixaffected: all versions before 2.28.8CVE List
  • Nixaffected: 2.29.0 before 2.30.6CVE List
  • Nixaffected: 2.31.0 before 2.31.6CVE List
  • Nixaffected: 2.32.0 before 2.34.9CVE List
  • Nixaffected: 2.35.0 before 2.35.3CVE List

References 1