In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Check for NULL FF-A ID table while driver registration The… (CVE-2026-64166)
A vulnerability in the Linux kernel's arm_ffa firmware driver was resolved by enforcing a check for a NULL FF-A ID table during driver registration. The flaw involved the bus match callback assuming every FF-A driver provides an id_table and dereferencing it without verification, which could cause a crash. This issue has been addressed to prevent buggy client drivers from crashing the bus during matching.
AI Analysis
Technical Summary
The Linux kernel vulnerability CVE-2026-64166 concerns the arm_ffa firmware driver where the bus match callback unconditionally dereferences the FF-A ID table provided by drivers. If a driver registers without an id_table (NULL), this leads to a crash. The fix enforces a contract at registration time to ensure the id_table is not NULL, preventing crashes caused by buggy client drivers.
Potential Impact
This vulnerability can cause a denial of service by crashing the bus during driver matching due to a NULL pointer dereference. It does not impact confidentiality or integrity but affects availability of the affected subsystem.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to enforce the presence of a non-NULL FF-A ID table during driver registration. Users should apply the official kernel update that includes this patch. Patch status is not explicitly confirmed in the provided data; check the Linux kernel vendor advisory for the exact fixed versions and update accordingly.
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Check for NULL FF-A ID table while driver registration The… (CVE-2026-64166)
Description
A vulnerability in the Linux kernel's arm_ffa firmware driver was resolved by enforcing a check for a NULL FF-A ID table during driver registration. The flaw involved the bus match callback assuming every FF-A driver provides an id_table and dereferencing it without verification, which could cause a crash. This issue has been addressed to prevent buggy client drivers from crashing the bus during matching.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability CVE-2026-64166 concerns the arm_ffa firmware driver where the bus match callback unconditionally dereferences the FF-A ID table provided by drivers. If a driver registers without an id_table (NULL), this leads to a crash. The fix enforces a contract at registration time to ensure the id_table is not NULL, preventing crashes caused by buggy client drivers.
Potential Impact
This vulnerability can cause a denial of service by crashing the bus during driver matching due to a NULL pointer dereference. It does not impact confidentiality or integrity but affects availability of the affected subsystem.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to enforce the presence of a non-NULL FF-A ID table during driver registration. Users should apply the official kernel update that includes this patch. Patch status is not explicitly confirmed in the provided data; check the Linux kernel vendor advisory for the exact fixed versions and update accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-hfhw-j953-vcq4
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64166"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27a82a4a8d598912a236
Added to database: 07/19/2026, 19:38:16 UTC
Last enriched: 08/13/2026, 19:12:42 UTC
Last updated: 08/27/2026, 22:52:13 UTC
Views: 42
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