CVE-2026-98115 is a vulnerability in Linux Kernel
Published on September 25, 2026
ksmbd: safely drain sessions during logoff
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.
Products Associated with CVE-2026-98115
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Affected Versions
Linux:- Version 76e98a158b207771a6c9a0de0a60522a446a3447 and below a7e6df0bb92642bee4431b2b85c69ada1e463b21 is affected.
- Version 76e98a158b207771a6c9a0de0a60522a446a3447 and below d12168084c8c1b6d883c8eca5853929ac5136a9e is affected.
- Version 118fd997612d1efc94a86c307c6c6d659ebe29fc is affected.
- Version c1e55020534c4aafbc38d8f5c4583ff30755ac18 is affected.
- Version 6.6.48 and below 6.7 is affected.
- Version 6.10.7 and below 6.11 is affected.
- Version 6.11 is affected.
- Before 6.11 is unaffected.
- Version 7.2.7, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.