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 has been resolved. The issue involved the bus match callback assuming every FF-A driver provides a non-NULL id_table and dereferencing it without checks. This could lead to a crash of the bus if a buggy client driver registers without an id_table. The fix enforces the presence of a valid id_table at driver registration time to prevent such crashes.
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 driver's id_table. If a client driver registers without providing an id_table (NULL), this leads to a crash of the bus. The vulnerability is addressed by enforcing the contract that every FF-A driver must provide a valid id_table during registration, preventing the bus from crashing due to a NULL pointer dereference.
Potential Impact
A buggy or malicious client driver lacking a valid id_table could cause the bus to crash during the match process, potentially leading to denial of service or instability in the affected system's firmware driver operations.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to enforce the presence of a non-NULL id_table during driver registration, preventing the bus crash. Users should apply the official Linux kernel updates that include this fix. Patch status is not explicitly stated in the provided data, so 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 has been resolved. The issue involved the bus match callback assuming every FF-A driver provides a non-NULL id_table and dereferencing it without checks. This could lead to a crash of the bus if a buggy client driver registers without an id_table. The fix enforces the presence of a valid id_table at driver registration time to prevent such crashes.
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 driver's id_table. If a client driver registers without providing an id_table (NULL), this leads to a crash of the bus. The vulnerability is addressed by enforcing the contract that every FF-A driver must provide a valid id_table during registration, preventing the bus from crashing due to a NULL pointer dereference.
Potential Impact
A buggy or malicious client driver lacking a valid id_table could cause the bus to crash during the match process, potentially leading to denial of service or instability in the affected system's firmware driver operations.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to enforce the presence of a non-NULL id_table during driver registration, preventing the bus crash. Users should apply the official Linux kernel updates that include this fix. Patch status is not explicitly stated in the provided data, so 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: 07/19/2026, 19:40:31 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 13
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