Race condition in Linux kernel - CVE-2026-98115
Published: September 28, 2026
Vulnerability identifier: #VU152345
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98115
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to a race condition in the ksmbd session teardown logic when coordinating concurrent session teardown and request cancellation. A remote user can issue SMB requests that trigger session logoff and cancellation processing to compromise confidentiality, integrity, and availability.
The issue affects SMB3 multichannel sessions, in which requests for a session can run across multiple connections.
Affected software
Linux kernel
How to mitigate CVE-2026-98115
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3