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Description

In the Linux kernel, the following vulnerability has been resolved: nsfs: tighten permission checks for ns iteration ioctls 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

a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 (git) before 3376b345df155ca36d8611857b41ff7d5183fc38
affected

a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 (git) before 2f3dea284c761c890d676f77d5e55c0c496b4ef4
affected

a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 (git) before 0ad650e60150eda789deca5e78a6a09d26bf8fc9
affected

a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 (git) before e6b899f08066e744f89df16ceb782e06868bd148
affected

Default status
affected

6.12
affected

Any version before 6.12
unaffected

6.12.78 (semver)
unaffected

6.18.20 (semver)
unaffected

6.19.9 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/3376b345df155ca36d8611857b41ff7d5183fc38

git.kernel.org/...c/2f3dea284c761c890d676f77d5e55c0c496b4ef4

git.kernel.org/...c/0ad650e60150eda789deca5e78a6a09d26bf8fc9

git.kernel.org/...c/e6b899f08066e744f89df16ceb782e06868bd148

cve.org (CVE-2026-43403)

nvd.nist.gov (CVE-2026-43403)

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