SB20260508128 - NULL pointer dereference in Linux kernel firmware driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-43410)

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 the stratix10-rsu driver when executing svc_normal_to_secure_thread() while RSU is disabled in firmware. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs after asynchronous message setup fails and the channel is freed, but the thread is still registered and later accesses the invalid channel.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/aa5739e0c51ad01c6e763ca89c1bfb58fc6ea71a
• https://git.kernel.org/stable/c/c45f7263100cece247dd3fa5fe277bd97fdb5687