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
linux: linux kernel
References6
- git.kernel.org/stable/c/0ce682867fd506f61f40c76bde7e4205bde34e87 Patch
- git.kernel.org/stable/c/20ee516a62989a8d505ee432f9e59525ea23984e Patch
- git.kernel.org/stable/c/5cbabf3a71575cd31bc7785d92d4ab42338a654b Patch
- git.kernel.org/stable/c/8cc9ec711f5255167247a9ab6a7179b787426ed7 Patch
- git.kernel.org/stable/c/b35afd5cf8fab236ef21117e42ee45691d4ffa7b Patch
- git.kernel.org/stable/c/b383bcad3d2fe634b26efbce53e22bbb5753a520 Patch
Metrics
- CVSS 3.1
-
9.1
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - EPSS — exploit probability
- 0% percentile: 42 · as of 14 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.