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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.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-08 | Updated 2026-05-08 | Assigner Linux

Product status

Default status
unaffected

5222470b2fbb3740f931f189db33dd1367b1ae75 (git) before 1797ee11451f1b2be69863a9f5bd43b948813fdf
affected

5222470b2fbb3740f931f189db33dd1367b1ae75 (git) before d2324a9317f00013facb0ba00b00440e19d2af5e
affected

Default status
affected

6.18
affected

Any version before 6.18
unaffected

6.19.9 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/1797ee11451f1b2be69863a9f5bd43b948813fdf

git.kernel.org/...c/d2324a9317f00013facb0ba00b00440e19d2af5e

cve.org (CVE-2026-43391)

nvd.nist.gov (CVE-2026-43391)

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