CVE-2024-27297 Nix Corruption of fixed-output derivations

Medium 6.3 Published 11 Mar 2024 Updated 27 Jun 2025

Attackers can modify fixed-output derivation contents after validation via Unix domain sockets, compromising package integrity in Nix.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2024-27297?

CVE-2024-27297 is a medium-severity vulnerability in NixOS nix, published on 11 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Nix is a package manager for Linux and other Unix systems. A fixed-output derivations on Linux can send file descriptors to files in the Nix store to another program running on the host (or another fixed-output derivation) via Unix domain sockets in the abstract namespace. This allows to modify the output of the derivation, after Nix has registered the path as "valid" and immutable in the Nix database. In particular, this allows the output of fixed-output derivations to be modified from their expected content. This issue has been addressed in versions 2.3.18 2.18.2 2.19.4 and 2.20.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Weakness: CWE-367

Which versions are affected by CVE-2024-27297?

It affects 1 product.

Products include Nixos Nix.

How do I fix CVE-2024-27297?

Upgrade to a fixed version.

Is CVE-2024-27297 being exploited?

There is no known exploitation of CVE-2024-27297 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2024-27297, DSA-5669-1, GHSA-2ffj-w4mj-pg37, UBUNTU-CVE-2024-27297.