SB20260720153 - Use-after-free in Linux kernel firmware arm_ffa driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-64080)

CWE-ID: CWE-416 - Use After Free

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 user to cause a denial of service.

The vulnerability exists due to a use-after-free in arm ffa notification handlers in drivers/firmware/arm_ffa/driver.c when handling notification callbacks during concurrent notifier unregistration. A local user can trigger notification handling while causing a notifier entry to be unregistered and freed to cause a denial of service.

The issue affects both the framework and non-framework notification paths.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0e7be42ef2490f19d859a6146324d48cafdc9d5c
• https://git.kernel.org/stable/c/38290b180a4d5746baed796d49f88d56d2f336cd
• https://git.kernel.org/stable/c/d1e38551fadea230649bc428f0f35c9ee062a072