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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-43391

nsfs: tighten permission checks for handle opening

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Status
Published
Published
Updated
Assigning organization
Linux

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 5222470b2fbb3740f931f189db33dd1367b1ae75 to < 24ebaf6676ae4f74f4856eb645959b15e62bc1b4affected
  • 5222470b2fbb3740f931f189db33dd1367b1ae75 to < 1797ee11451f1b2be69863a9f5bd43b948813fdfaffected
  • 5222470b2fbb3740f931f189db33dd1367b1ae75 to < d2324a9317f00013facb0ba00b00440e19d2af5eaffected

Linux Linux

Default version status: affected

  • 6.18affected
  • 0 to < 6.18unaffected
  • 6.18.50 to ≤ 6.18.*unaffected
  • 6.19.9 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References