CVE-2026-110450 NixOS CVE debrief

Who should care

Defenders responsible for Nix and Lix systems should assess exposure and apply patches or mitigations. This includes operators, platform administrators, vulnerability management teams, and security teams. They should verify Nix and Lix versions, assess exposure, and apply patches or mitigations to prevent potential system compromise.

Why it matters

CVE-2026-110450 is a high-severity vulnerability affecting Nix and Lix, allowing for privilege escalation and potential system compromise.

• Privilege escalation is possible via a repair operation
• Content verification may be bypassed
• System compromise may occur if not patched

Technical summary

The vulnerability allows for privilege escalation via a repair operation in Nix before 2.35.3 and Lix before 2.95.4. This could lead to potential system compromise if not patched. Defenders should assess exposure and apply patches or mitigations. The vulnerability is related to the repair operation, which could destroy and then replace a store path before content verification.

Defensive priority

Defenders should prioritize verifying Nix and Lix versions, assessing exposure, and applying patches or mitigations.

Recommended defensive actions

• Verify Nix and Lix versions and assess exposure
• Apply patches or mitigations for vulnerable versions
• Monitor systems for suspicious activity

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and references to additional information. Evidence is limited to publicly available data and may not be comprehensive. Defenders should verify Nix and Lix versions, assess exposure, and apply patches or mitigations. Additional information may be available from official advisories and vulnerability databases.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.