CyberRota Analysis
AI-GeneratedA vulnerability in the Linux kernel allows a malicious or malformed Thunderbolt device to exploit an unchecked dual link port number, potentially leading to out-of-bounds memory access when indexing the sw->ports array. This can result in memory corruption and may allow an attacker to execute arbitrary code or cause system instability. Organizations using Linux systems with Thunderbolt support should prioritize addressing this issue to mitigate potential security risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Bound the DROM dual link port number before indexing sw->ports tb_drom_parse_entry_port() validates the device-supplied header->index against sw->config.max_port_number before indexing sw->ports[], but the sibling field entry->dual_link_port_nr -- a 6-bit value also read from the DROM -- indexes the same array with no such check. A malicious or malformed Thunderbolt device can set dual_link_port_nr beyond the allocated sw->ports[] (max_port_number + 1 entries), producing an out-of-bounds tb_port pointer that is stored and later dereferenced. Reject a port entry whose dual_link_port_nr exceeds max_port_number, the same bound already applied to header->index.