Unchecked Error Condition in Linux kernel - CVE-2026-90164
Published: September 19, 2026
Vulnerability identifier: #VU151323
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90164
CWE-ID: CWE-391
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper error handling in ksmbd server initialization when procfs setup fails. A local user can start the ksmbd server after a procfs or per-cpu counter allocation failure to cause a denial of service.
The NULL per-CPU counters pointer is reached on SMP systems.
Affected software
Linux kernel
How to mitigate CVE-2026-90164
Install security update from vendor's repository.