CVE-2026-64393

CVE CVE-2026-64393EUVD EUVD-2026-48937Published 2026-07-25T08:50:39.000ZLast changed 2026-08-05T12:41:30.000ZCVSS 9.1

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.1.4; patch: 6.1.178; patch: 0; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b35afd5cf8fab236ef21117e42ee45691d4ffa7b; patch: 6.18.39; patch: 6.12.96; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <0ce682867fd506f61f40c76bde7e4205bde34e87; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <20ee516a62989a8d505ee432f9e59525ea23984e; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b383bcad3d2fe634b26efbce53e22bbb5753a520; patch: 6.6.145; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5cbabf3a71575cd31bc7785d92d4ab42338a654b; 5.15; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <8cc9ec711f5255167247a9ab6a7179b787426ed7; patch: 7.2-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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