CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's iwlwifi driver, specifically in the BA session handlers where an unchecked zero value in the sta_mask can lead to an out-of-bounds access. This flaw could potentially allow an attacker to exploit the system, leading to unauthorized access or crashes. Organizations using Linux systems with the iwlwifi driver should prioritize patching this vulnerability to mitigate the associated risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers Three BA session handlers use ffs(ba_data->sta_mask) - 1 to derive a station ID without checking that sta_mask is non-zero. When sta_mask is zero, ffs() returns 0 and the subtraction wraps to 0xFFFFFFFF, causing an out-of-bounds access on fw_id_to_link_sta[]. Add WARN_ON_ONCE(!ba_data->sta_mask) guards before each ffs() call, consistent with the existing check in iwl_mld_ampdu_rx_start().
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