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Vulnerabilities CVE-2026-64393

CVE-2026-64393

None
Open
TLP:CLEAR

ksmbd: run set info with opener credentials

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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.

Details

EPSS Score
0.48%

39.3th percentile

Confidence
90%
Published
Jul 25, 2026
Last Modified
Jul 25, 2026
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