CVE-2025-52991

Description

The Nix, Lix, and Guix package managers default to using temporary build directories in a world-readable and world-writable location. This allows standard users to deceive the package manager into using directories with pre-existing content, potentially leading to unauthorized actions or data manipulation. 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.

Reserved 2025-06-23 | Published 2025-06-27 | Updated 2025-06-27 | Assigner mitre

Problem types

CWE-276 Incorrect Default Permissions

Product status

Default status
unaffected

Any version before 2.24.15
affected

2.25.0 before 2.26.4
affected

2.27.0 before 2.28.4
affected

2.29.0 before 2.29.1
affected

References

discourse.nixos.org/...escalations-in-nix-lix-and-guix/66017

lix.systems/blog/2025-06-24-lix-cves/

guix.gnu.org/...5/privilege-escalation-vulnerabilities-2025/

security.snyk.io/vuln/?search=CVE-2025-52991

security-tracker.debian.org/tracker/CVE-2025-52991

labs.snyk.io

cve.org (CVE-2025-52991)

nvd.nist.gov (CVE-2025-52991)

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