CVE-2026-110449 Integer overflow in Nix
An integer overflow in Nix allows out-of-bounds writes when evaluating untrusted expressions, potentially enabling code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110449?
CVE-2026-110449 is a high-severity vulnerability in NixOS Nix, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-190
Which versions are affected by CVE-2026-110449?
How do I fix CVE-2026-110449?
No fix has been published for CVE-2026-110449 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-110449 being exploited?
There is no known exploitation of CVE-2026-110449 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-110449, GHSA-5jjg-xg55-6mw3, UBUNTU-CVE-2026-110449.