What happened
In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for handle opening Even privileged services should not necessarily be able to see other privileged service's namespaces so they can't leak information to each other. Use may_see_all_namespaces() helper that centralizes this policy until the nstree adapts.
Affected versions
Linux: 5222470b2fbb3740f931f189db33dd1367b1ae75 through before 24ebaf6676ae4f74f4856eb645959b15e62bc1b4 (git); 5222470b2fbb3740f931f189db33dd1367b1ae75 through before 1797ee11451f1b2be69863a9f5bd43b948813fdf (git); 5222470b2fbb3740f931f189db33dd1367b1ae75 through before d2324a9317f00013facb0ba00b00440e19d2af5e (git); 6.18 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.