Vulnerability · Published Oct 14, 2026 · Assigned by mitre
CVE-2026-110449
High 7.5
In plain English
A high-severity integer overflow in Nix from NixOS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.2%top 83.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nix | no fix listed | DEBIAN-CVE-2026-110449 |
| Debian:13 | nix | no fix listed | DEBIAN-CVE-2026-110449 |
| Debian:14 | nix | 2.35.4+dfsg-1 | DEBIAN-CVE-2026-110449 |
| Ubuntu:26.04:LTS | nix | no fix listed | UBUNTU-CVE-2026-110449 |
| Ubuntu:26.10 | nix | no fix listed | UBUNTU-CVE-2026-110449 |
Affected products (as reported)
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L