CyberRota Analysis
AI-GeneratedA vulnerability in the Linux kernel's FPGA driver allows the function dfh_get_param_size() to return an inflated parameter size, potentially exceeding the allocated feature region. This flaw can lead to memory corruption when create_feature_instance() invokes memcpy_fromio() with an oversized size, posing a risk if a malicious FPGA device sends crafted DFHv1 parameter headers. Organizations utilizing Linux systems with FPGA support should prioritize this issue to mitigate potential exploitation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: fpga: dfl: add bounds check in dfh_get_param_size() dfh_get_param_size() can return a parameter size larger than the feature region because the loop bounds check is evaluated before incrementing size. If the EOP (End of Parameters) bit is set in the same iteration, the inflated size is returned without re-validation against max. This can cause create_feature_instance() to call memcpy_fromio() with a size exceeding the ioremap'd region when a malicious FPGA device provides crafted DFHv1 parameter headers. Add a bounds check after the size increment to ensure the accumulated size never exceeds the feature boundary.