CVE-2024-27297

Summary

CVE-2024-27297 is a vulnerability affecting Nix, a popular package manager for Linux and other Unix systems. The issue involves fixed-output derivations on Linux, which can inadvertently send file descriptors to files in the Nix store. These file descriptors can be used by another program running on the host or another fixed-output derivation to modify the output of the derivation, even after it has been registered as "valid" and immutable in the Nix database. This can lead to unexpected and potentially harmful changes to the output. The vulnerability has been addressed in versions 2.3.18, 2.18.2, 2.19.4, and 2.20.5. Users are strongly encouraged to upgrade as soon as possible, as there are currently no known workarounds for this issue.

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