CVE-2025-36932

Technical Details

CVE-2025-36932 stems from a lack of sufficient input validation within the tracepoint_msg_handler function. This function is responsible for handling messages related to tracepoints, a debugging and tracing mechanism within the Android operating system. The vulnerability arises because the function does not adequately check the size or format of the incoming message data. An attacker can craft a malicious message that, when processed by tracepoint_msg_handler, overwrites memory beyond the intended buffer. This memory overwrite can corrupt critical system data or inject malicious code, leading to privilege escalation. The vulnerability is exploitable locally, meaning an attacker needs to have some level of access to the device, but no additional execution privileges are required beyond that initial access. User interaction is not needed to trigger the vulnerability once the attacker has the initial foothold.

The root cause lies in the insufficient bounds checking before writing data to a memory buffer. Specifically, the size of the data being copied is not validated against the allocated size of the destination buffer. This allows an attacker to send a message with a size parameter that exceeds the buffer's capacity, resulting in a buffer overflow and subsequent memory overwrite.