CVE-2026-98115

/// Technical description

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

ksmbd: safely drain sessions during logoff

SMB3 multichannel allows requests for one session to run on multiple

connections. Wait for all channels bound to a session before freeing

shared session objects.

A deferred byte-range lock remains counted as a running request and only

wakes when its file closes. Wake blocked locks during the drain without

unpublishing or modifying their file objects. Synchronous CANCEL requests

must invoke their cancellation callback to wake pending operations, while

CHANGE_NOTIFY completion remains specific to the asynchronous path.

Serialize session teardown with channel registration and previous-session

cleanup, and use atomic work-state transitions so LOGOFF, CANCEL, and

connection teardown invoke cancellation callbacks only once.

/// Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// Affected products

/// References