NULL pointer dereference in Linux kernel - #VU133348
Published: June 4, 2026
Vulnerability identifier: #VU133348
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in drivers/pci/endpoint/functions/pci-epf-vntb.c when handling workqueue allocation failure. A local user can trigger the vulnerable code path to cause a denial of service.
The issue occurs if alloc_workqueue() fails and the code later uses the NULL workqueue pointer.
Remediation
Install security update from vendor's repository.