CVE-2026-64391
CRITICAL
9,8
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: use opener credentials for ADS I/O
Alternate data streams are stored as xattrs. Unlike regular file I/O,
their read and write paths therefore call VFS xattr helpers which recheck
inode permissions and LSM policy using the current task credentials.
Run ADS I/O with the credentials captured when the SMB handle was opened.
https://git.kernel.org/stable/c/2b4592cea214683de0f2ce6f8c22c097fb0ea1ab
https://git.kernel.org/stable/c/52a56cf53ec834c44ac1b4d16d585f26613ee5ce
https://git.kernel.org/stable/c/a8f5d39971bbad9340d49cd41b0e2da9452a649d
https://git.kernel.org/stable/c/baa5e094886fffa7e6272edcb5e08be5ce28262c