What’s Vulnerable › Vulnerabilities

CVE-2026-64166: firmware: arm_ffa: Check for NULL FF-A ID table while driver registration

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-08-13
• Weakness: CWE-476

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.

Affected products

• Linux kernel: from 5.14.1 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11 — fixed in 5.15.209, 6.1.175, 6.12.92, 6.18.34, 6.6.142, 7.0.11

How to fix

Upgrade to a fixed version: Linux kernel 5.15.209, 6.1.175, 6.12.92, 6.18.34. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0a5e695095c557d2380131b613dea4e8d90371be
• https://git.kernel.org/stable/c/198f6c86d508ed562f07dc00276cac6dbb5dd3bf
• https://git.kernel.org/stable/c/34f59211984f66788390e7469f3e99d3796db4a8
• https://git.kernel.org/stable/c/820245d86ce58898fb48b4fefc77d0cafc02801d
• https://git.kernel.org/stable/c/adfff93d08a2e12ecf2a1eba272d18bc749f13c0
• https://git.kernel.org/stable/c/bc499d1acddbb75b5b4bce05f5296dd8ef9611fd
• https://git.kernel.org/stable/c/f98f131256beaddd51ad468e95d90d857fef12bf

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