SB2026060443 - NULL pointer dereference in Linux kernel endpoint functions driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2025-71313)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a NULL pointer dereference in epf_ntb_epc_init() and the pci endpoint ntb workqueue initialization logic 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 queue_work() is later called with a NULL workqueue pointer.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/03f336a869b3a3f119d3ae52ac9723739c7fb7b6
• https://git.kernel.org/stable/c/314eab6740bcda504ef978be599f805de05ce6de