CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's ath12k Wi-Fi driver, specifically in the handling of the CSA switch count event, which can lead to out-of-bounds reads due to insufficient length checks on the event structure. This flaw could potentially allow an attacker to exploit memory access violations, leading to information disclosure or system instability. Organizations using affected Linux distributions with ath12k drivers should prioritize patching this vulnerability to mitigate risks associated with memory corruption.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix overreads in ath12k_wmi_process_csa_switch_count_event() There is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so the parse infrastructure does not enforce a minimum length for the event struct. Additionally, the num_vdevs field is taken directly from firmware and used as a loop bound over the vdev_ids array without checking that it fits within the TLV payload. Either condition can cause an out-of-bounds read. Add a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so the parse infrastructure enforces a minimum length for the fixed-size event struct. Add a helper ath12k_wmi_tlv_data_len() to recover the payload length of a parsed TLV from the header preceding its data pointer. Use it in ath12k_wmi_process_csa_switch_count_event() to bound num_vdevs before the loop. Compile tested only.