SB20260827140 - NULL pointer dereference in Linux kernel firewire driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-74734)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.8 [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]

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

The vulnerability exists due to a null pointer dereference in ar_context_release() in the firewire ohci driver when handling device probe error cleanup. A local attacker can trigger an early pci_probe() failure to cause a denial of service.

The issue occurs on the driver's error handling path before the asynchronous receive context has been successfully initialized.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/42d217add8d80d6e7d9f58f80d11ea9b07ea113e
• https://git.kernel.org/stable/c/7d228ba43279de2d191f25e139fad166409c2c06
• https://git.kernel.org/stable/c/ed5470771c7ed7f959230c4697f316af83426a90