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Medium · 5.8 CVE-2026-25740 EUVD-2026-6848

Privilege escalation to the `CAP_NET_RAW` capability via the `programs.captive-browser` NixOS module

Published Feb 9, 2026 · Updated Feb 10, 2026 · Assigned by GitHub_M

Description

captive browser, a dedicated Chrome instance to log into captive portals without messing with DNS settings. In 25.05 and earlier, when programs.captive-browser is enabled, any user of the system can run arbitrary commands with the CAP_NET_RAW capability (binding to privileged ports, spoofing localhost traffic from privileged services...). This vulnerability is fixed in 25.11 and 26.05.

Affected products

VendorProductAffectedFixed
NixOS nixpkgs <= 25.05 —

References