Riskcovery

CVE-2026-43403

nsfs: tighten permission checks for ns iteration ioctls

State
Published
Severity
8.8 High
Published
May 8, 2026
Updated
Aug 5, 2026
Reserved
May 1, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 to before 3376b345df155ca36d8611857b41ff7d5183fc38Affected
  • a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 to before 2f3dea284c761c890d676f77d5e55c0c496b4ef4Affected
  • a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 to before 0ad650e60150eda789deca5e78a6a09d26bf8fc9Affected
  • a1d220d9dafa8d76ba60a784a1016c3134e6a1e8 to before e6b899f08066e744f89df16ceb782e06868bd148Affected
LinuxLinux
  • 6.12Affected
  • before 6.12Not affected
  • 6.12.78 through 6.12.*Not affected
  • 6.18.20 through 6.18.*Not affected
  • 6.19.9 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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