CVE-2026-64166
Received Received - Intake

NULL Pointer Dereference in Linux Kernel ARM FF-A Driver

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Check for NULL FF-A ID table while driver registration The bus match callback assumes that every FF-A driver provides an id_table and dereferences it unconditionally. Enforce that contract at registration time so a buggy client driver cannot crash the bus during match.

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64166
EUVD
EUVD-2026-45851

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's firmware subsystem, specifically in the arm_ffa driver. It involves a missing check for a NULL ID table during driver registration. The bus match callback assumes every FF-A driver provides an id_table and dereferences it without validation, which could cause a crash if a buggy driver fails to provide one.

Detection Guidance

This vulnerability is specific to the Linux kernel's firmware subsystem (arm_ffa). Detection requires checking kernel logs for crashes related to FF-A driver registration or examining kernel modules for NULL id_table dereferences during bus matching.

Impact Analysis

If exploited, this flaw could lead to a system crash or instability when a buggy FF-A driver registers with the kernel. This may cause denial-of-service conditions, disrupting services or applications relying on the affected subsystem.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a low-level Linux kernel issue related to driver registration and memory safety. It does not involve data processing, storage, or transmission that these regulations typically address.

Mitigation Strategies

Apply the latest Linux kernel security patches that address this issue. Monitor kernel logs for FF-A driver registration errors. Ensure all FF-A drivers properly initialize their id_table before registration.

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