What’s Vulnerable › Vulnerabilities

CVE-2026-80574: Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-10-16

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

• Linux kernel: 4.0 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

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
• https://git.kernel.org/stable/c/83c265bfc084d77e2171d4b67362150ab38c935b
• https://git.kernel.org/stable/c/bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f
• https://git.kernel.org/stable/c/ca92c98b806839c108995b2bbff7061515bdfb53

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