Nix/Lix/Guix CVE-2025-52991 World-Readable Temp Directory Privilege Escalation

Key Information Vulnerability Name CVE-2025-52991 Description Nix, Lix, and Guix package managers by default use temporary build directories that are world-readable and world-writable. This allows standard users to trick the package manager into using directories with pre-existing content, potentially leading to unauthorized operations or data manipulation. Affected versions include: Nix: 2.2.15, 2.2.6.4, 2.2.8.4, 2.2.9.1, 2.9.1.2, 2.9.2.2, 2.9.3.1 Lix: 2.2.15, 2.2.6.4, 2.2.8.4, 2.2.9.1, 2.9.1.2, 2.9.2.2, 2.9.3.1 Guix: 1.4.0-38.0e79d5b Affected Packages and Fix Status Fixed Version Information Related Links https://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/ https://codeberg.org/guix/guix/pulls/788 https://codeberg.org/guix/guix/commit/7173c2c0cad8afc9d8d1ad26f345b5a04f47716a https://codeberg.org/guix/guix/commit/be8aca065118aa4485c02f991c51bea89034defa https://codeberg.org/guix/guix/commit/fb42611b8f27960304db5a1c0d33b8371dcde2a8 https://codeberg.org/guix/guix/commit/c659f977bb09de6d5615e6aa9efddedc1d9ff458 https://codeberg.org/guix/guix/commit/0e79d5b6550729e6ce3bac1e979638ac054ba5a5 https://codeberg.org/guix/guix/commit/30a5d140aa5a789a362749d057754783fea83dde

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Nix/Lix/Guix CVE-2025-52991 World-Readable Temp Directory Privilege Escalation