CVE-2025-46416 Privilege escalation in Nix
Attackers can bypass build isolation to elevate privileges to the build user account in Nix, Lix, and Guix package managers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-46416?
CVE-2025-46416 is a low-severity vulnerability in NixOS Nix, published on 27 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Nix, Lix, and Guix package managers allow a bypass of build isolation in which a user can elevate their privileges to the build user account (e.g., nixbld or guixbuild). This affects Nix through 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix through 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b.
Weakness: CWE-282
Which versions are affected by CVE-2025-46416?
How do I fix CVE-2025-46416?
No fix has been published for CVE-2025-46416 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-46416 being exploited?
There is no known exploitation of CVE-2025-46416 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-46416, GHSA-33x6-8x8r-9jpw, UBUNTU-CVE-2025-46416.