CVE-2025-52993 (CVSS 5.6)

Description

A race condition in the Nix, Lix, and Guix package managers enables changing the ownership of arbitrary files to the UID and GID of the build user (e.g., nixbld* or guixbuild*). This affects Nix before 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix before 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b.

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CVSS v3.1 Score

5.6

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Weakness Type (CWE)

CWE-362 CWE-362

References

Other References

https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017 https://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/ https://labs.snyk.io https://lix.systems/blog/2025-06-24-lix-cves/ https://security-tracker.debian.org/tracker/CVE-2025-52993 https://security.snyk.io/vuln/?search=CVE-2025-52993

Frequently Asked Questions

What is CVE-2025-52993? +

A race condition in the Nix, Lix, and Guix package managers enables changing the ownership of arbitrary files to the UID and GID of the build user (e.g., nixbld* or guixbuild*). This affects Nix before 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix before 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b. It has a CVSS v3.1 base score of 5.6 (MEDIUM).

How severe is CVE-2025-52993? +

CVE-2025-52993 has a CVSS v3.1 score of 5.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-52993? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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