CVE-2026-25740
Privilege escalation to the `CAP_NET_RAW` capability via the `programs.captive-browser` NixOS module
- State
- Published
- Severity
- 5.8 Medium
- Published
- Feb 9, 2026
- Updated
- Feb 10, 2026
- Reserved
- Feb 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.8 Medium | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-250 Execution with Unnecessary Privileges
Affected Products
| Product | Versions |
|---|---|
nixpkgsNixOS |
|
References
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