CVE-2025-52993

5.6 mediumEPSS 0.1%

Medium (5.6). EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.6 medium

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
CWE: CWE-362
Published: 2025-06-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

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

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