CVE-2026-90156
kernel: ksmbd: safely discard unregistered deferred locks
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 21, 2026
Description
A flaw was found in ksmbd, a component of the Linux kernel. When handling deferred locks, a failure in setting up asynchronous work can lead to a null pointer dereference and the continued linking of a freed file lock. This memory corruption issue can cause a system crash, resulting in a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference