SB2026101709 - Fedora EPEL 10.3 update for nix

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Main Vulnerability Database SB2026101709

SB2026101709 - Fedora EPEL 10.3 update for nix

Published: October 17, 2026

Security Bulletin ID SB2026101709
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Authorization (CVE-ID: CVE-2026-110450)

CWE-ID: CWE-285 - Improper Authorization

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to corrupt arbitrary store objects and escalate privileges.

The vulnerability exists due to improper authorization in the nix-daemon AddToStoreNar and AddMultipleToStore operations when processing client-supplied NAR contents in repair mode. A local user can submit crafted NAR contents with the repair flag enabled to corrupt arbitrary store objects and escalate privileges.

Exploitation is available to users matched by allowed-users even when they are not listed in trusted-users. Privilege escalation requires a privileged service to execute files from a corrupted store object; in multi-user configurations, the Nix daemon itself can provide this execution path when running as root.


Remediation

Install update from vendor's website.

References