CVEvulnerability

CVE-2026-43391

8.8 HIGH Published 2026-05-08 Modified 2026-09-07 Official page ↗

Status: Modified
Published: 2026-05-08
Last modified: 2026-09-07
Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67): 8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Description

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 configurations

• linux linux kernel (>= 6.18 < 6.19.9) • linux linux kernel 7.0

References

https://git.kernel.org/stable/c/1797ee11451f1b2be69863a9f5bd43b948813fdf Patch
https://git.kernel.org/stable/c/24ebaf6676ae4f74f4856eb645959b15e62bc1b4 git.kernel.org
https://git.kernel.org/stable/c/d2324a9317f00013facb0ba00b00440e19d2af5e Patch