Read the docs
TI-2025-32997 Aliases CVE-2025-52992GHSA-wcw8-hffm-7w9g

Incorrect permission assignment in NixOS Nix

Priority LOW 15CWE-732Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The Nix, Lix, and Guix package managers fail to properly set permissions when a derivation build fails. This may allow arbitrary processes to modify the content of a store outside of the build sandbox. 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00171 6th percentileScored 2026-11-07
Fix Fixed Nix (NixOS): 2.24.15, 2.26.4, 2.28.4 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NixOSNixbefore 2.24.15; 2.25.0 to before 2.26.4; 2.27.0 to before 2.28.4; 2.29.0 to before 2.29.12.24.15, 2.26.4, 2.28.4, 2.29.1Patch availableCNA
  • Nix VendorNixOS Affected before 2.24.15; 2.25.0 to before 2.26.4; 2.27.0 to before 2.28.4; 2.29.0 to before 2.29.1 Fixed in 2.24.15, 2.26.4, 2.28.4, 2.29.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*——NixOS
  • cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* Versions — — ·NixOS

Remediation

  • Fix · CNA Nix (NixOS) Fixed in 2.24.15, 2.26.4, 2.28.4, 2.29.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    NixOS Nix 2.24.15, 2.26.4 and 2 more versions

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2025-29136 Time-of-check time-of-use race condition in NixOS NixPriority MEDIUM 49
    • TI-2025-32998 Race condition in NixOS NixPriority LOW 24
    • TI-2025-32996 Incorrect default permissions in NixOS NixPriority LOW 15
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-52992
  2. 2026-10-03 Alias added: GHSA-wcw8-hffm-7w9g

References

Other 4

  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
  • TI-2024-11208 Rsync: heap buffer overflow in rsync due to improper checksum length handling CVSS 3.1CRITICAL 9.8
  • TI-2026-19201 Tandoor Recipes module allows SQLite database to be externally accessible with the default settings CVSS 4.0HIGH 8.7
  • TI-2024-11209 Rsync: info leak via uninitialized stack contents CVSS 3.1HIGH 7.5
  • TI-2024-11212 Rsync: --safe-links option bypass leads to path traversal CVSS 3.1HIGH 7.5
  • TI-2024-11211 Rsync: path traversal vulnerability in rsync CVSS 3.1HIGH 7.5
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences