---
id: CVE-2026-98115
title: |-
  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
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 b…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 76e98a158b207771a6c9a0de0a60522a446a3447 <
    a7e6df0bb92642bee4431b2b85c69ada1e463b21
  - >-
    Linux >= 76e98a158b207771a6c9a0de0a60522a446a3447 <
    d12168084c8c1b6d883c8eca5853929ac5136a9e
  - Linux 118fd997612d1efc94a86c307c6c6d659ebe29fc
  - Linux c1e55020534c4aafbc38d8f5c4583ff30755ac18
  - Linux >= 6.6.48 < 6.7
  - Linux >= 6.10.7 < 6.11
  - Linux 6.11
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T15:18:06.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98115'
references:
  - url: 'https://git.kernel.org/stable/c/a7e6df0bb92642bee4431b2b85c69ada1e463b21'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d12168084c8c1b6d883c8eca5853929ac5136a9e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.824Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.