CVE-2026-90168

Summary

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: retain connection for pending notify work

Deferred CHANGE_NOTIFY work keeps an async message ID after the original request work is released. A durable handle can outlive its connection, so the connection teardown can destroy its async IDA before the handle close releases the pending notify work.

Give the synthetic deferred work a connection reference. Release it after the async ID in ksmbd_free_work_struct(). This keeps the async IDA alive until the deferred work is released, even when the original connection has already left the connection list.

During server shutdown there is no client to receive a cleanup response. Skip the write and only release the pending work.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 50be5e96c381ae995b7de3869eecdc84476be7f2affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f495154703cbcc0050cfd53469bd56965791616baffected
LinuxLinux0 < 7.2.6affected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References