[NVD] CVE-2026-43391 (HIGH 8.8) — 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_

CVE-2026-43391 CVSS: 8.8 HIGH Published: 2026-05-08T15:16:50.490

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 u