CVE-2026-31690
HighSummary
A vulnerability related to a buffer overflow in the TH1520 AON firmware protocol driver has been fixed in the Linux kernel. The issue involved unsafe pointer arithmetic and the replacement of custom endianness conversion macros with standard kernel macros.
Risk Assessment
Failure to apply this fix may lead to buffer overflow, potentially resulting in unauthorized access or system crashes. Additionally, the use of custom macros may affect code portability and maintainability.
Recommendation
It is recommended to update the Linux kernel to the latest version to eliminate this vulnerability and improve code portability and maintainability.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: firmware: thead: Fix buffer overflow and use standard endian macros Addresses two issues in the TH1520 AON firmware protocol driver: 1. Fix a potential buffer overflow where the code used unsafe pointer arithmetic to access the 'mode' field through the 'resource' pointer with an offset. This was flagged by Smatch static checker as: "buffer overflow 'data' 2 <= 3" 2. Replace custom RPC_SET_BE* and RPC_GET_BE* macros with standard kernel endianness conversion macros (cpu_to_be16, etc.) for better portability and maintainability. The functionality was re-tested with the GPU power-up sequence, confirming the GPU powers up correctly and the driver probes successfully. [ 12.702370] powervr ffef400000.gpu: [drm] loaded firmware powervr/rogue_36.52.104.182_v1.fw [ 12.711043] powervr ffef400000.gpu: [drm] FW version v1.0 (build 6645434 OS) [ 12.719787] [drm] Initialized powervr 1.0.0 for ffef400000.gp

