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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-64393

ksmbd: run set info with opener credentials

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: run set info with opener credentials SMB2 SET_INFO handlers call path-based VFS helpers after checking the access mask granted to the SMB handle. Those helpers perform their owner, inode permission and LSM checks using the current ksmbd worker credentials. Run the complete SET_INFO dispatch with the credentials captured when the handle was opened. This also removes the separate security information credential setup and keeps all SET_INFO classes under one credential scope. Direct override_creds() is used because it can nest with the request credential overrides already used by rename and link helpers.

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

  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 5cbabf3a71575cd31bc7785d92d4ab42338a654baffected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < b35afd5cf8fab236ef21117e42ee45691d4ffa7baffected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 0ce682867fd506f61f40c76bde7e4205bde34e87affected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 20ee516a62989a8d505ee432f9e59525ea23984eaffected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 8cc9ec711f5255167247a9ab6a7179b787426ed7affected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < b383bcad3d2fe634b26efbce53e22bbb5753a520affected

Linux Linux

Default version status: affected

  • 5.15affected
  • 0 to < 5.15unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.96 to ≤ 6.12.*unaffected
  • 6.18.39 to ≤ 6.18.*unaffected
  • 7.1.4 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References