CVE-2026-98115

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux76e98a158b207771a6c9a0de0a60522a446a3447 < a7e6df0bb92642bee4431b2b85c69ada1e463b21affected
LinuxLinux76e98a158b207771a6c9a0de0a60522a446a3447 < d12168084c8c1b6d883c8eca5853929ac5136a9eaffected
LinuxLinux118fd997612d1efc94a86c307c6c6d659ebe29fcaffected
LinuxLinuxc1e55020534c4aafbc38d8f5c4583ff30755ac18affected
LinuxLinux6.6.48 < 6.7affected
LinuxLinux6.10.7 < 6.11affected
LinuxLinux6.11affected
LinuxLinux0 < 6.11unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References