High severity8.4NVD Advisory· Published Aug 26, 2026· Updated Aug 27, 2026
CVE-2026-80574
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].
Affected products
2Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/063b4c6a6f3fc01bca085c442000c9c100fdbd93nvd
- git.kernel.org/stable/c/1842e47126816e56d30c4f856f9854fd7831066cnvd
- git.kernel.org/stable/c/296736076b3fd078742651c719555a488624023anvd
- git.kernel.org/stable/c/6f6d5fe29efdf5001bc146fc292e6592cace93ebnvd
- git.kernel.org/stable/c/81b07470cb2937ceb74b00be88151582a322433bnvd
- git.kernel.org/stable/c/83c265bfc084d77e2171d4b67362150ab38c935bnvd
- git.kernel.org/stable/c/bb502d79acb9ac1e0a77fa8bc7b7b4729140b11fnvd
- git.kernel.org/stable/c/ca92c98b806839c108995b2bbff7061515bdfb53nvd
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