CVE-2026-80574

Description

In the Linux kernel, the following vulnerability has been resolved: Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet Make finger2 (and also finger1) unsigned, so that if the finger index in the packet is 0 then subtracting 1 creates an array index which overflows above the existing check for FOC_MAX_FINGERS, as the existing comment says it should, instead of writing to state->fingers[-1].

References

• https://git.kernel.org/stable/c/063b4c6a6f3fc01bca085c442000c9c100fdbd93
• https://git.kernel.org/stable/c/1842e47126816e56d30c4f856f9854fd7831066c
• https://git.kernel.org/stable/c/296736076b3fd078742651c719555a488624023a
• https://git.kernel.org/stable/c/6f6d5fe29efdf5001bc146fc292e6592cace93eb
• https://git.kernel.org/stable/c/81b07470cb2937ceb74b00be88151582a322433b