CVE-2026-64392
CRITICAL
9,1
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: high
Availability: high
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: use opener credentials for delete-on-close
Delete-on-close can be completed by deferred or durable handle teardown,
where no request work is available. Both the base-file unlink and the ADS
xattr removal consequently run with the ksmbd worker credentials and can
bypass filesystem permission checks.
Run both operations with the credentials captured in struct file when the
handle was opened. This preserves the authenticated user's fsuid, fsgid,
supplementary groups and capability restrictions at final close.
https://git.kernel.org/stable/c/18c59109bb6fb816d5102171666f87cf1e29901d
https://git.kernel.org/stable/c/4b7059974549d278e30fe70e2a4e421f9839817d
https://git.kernel.org/stable/c/52e2f21911158ec961cd5aae19c56460db382af0
https://git.kernel.org/stable/c/e72c15085b6d86f45d224d98aa75b5cace4aaab9
https://git.kernel.org/stable/c/f08b3f451f12eee4abd8a5981803bc36db84458b