CVE-2026-64392
Description
A flaw was found in the ksmbd component of the Linux kernel. This vulnerability allows an attacker to bypass filesystem permission checks during 'delete-on-close' operations. Specifically, when a file handle is torn down, the base-file unlink and extended attribute (xattr) removal operations incorrectly execute with ksmbd worker credentials instead of the original opener's credentials. This can lead to unauthorized deletion of files or removal of extended attributes, potentially compromising data integrity and availability.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
A user can assume the identity of another user with separate privileges in another context. This will give the user unauthorized access that may allow them to acquire the access information of other users.
Frequently Asked Questions
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