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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 2026-05-11 | Assigner Linux




HIGH: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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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