CVE-2026-80574

Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet

State: Published
Severity: 8.4 High
Published: Aug 26, 2026
Updated: Oct 16, 2026
Reserved: Aug 26, 2026

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].

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 063b4c6a6f3fc01bca085c442000c9c100fdbd93Affected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before bb502d79acb9ac1e0a77fa8bc7b7b4729140b11fAffected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before ca92c98b806839c108995b2bbff7061515bdfb53Affected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 81b07470cb2937ceb74b00be88151582a322433bAffected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 6f6d5fe29efdf5001bc146fc292e6592cace93ebAffected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 83c265bfc084d77e2171d4b67362150ab38c935bAffected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 1842e47126816e56d30c4f856f9854fd7831066cAffected 05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 296736076b3fd078742651c719555a488624023aAffected
LinuxLinux	4.0Affected before 4.0Not affected 5.10.266 through 5.10.Not affected 5.15.217 through 5.15.Not affected 6.1.184 through 6.1.Not affected 6.6.153 through 6.6.Not affected 6.12.105 through 6.12.Not affected 6.18.46 through 6.18.Not affected 7.1.10 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 063b4c6a6f3fc01bca085c442000c9c100fdbd93Affected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before bb502d79acb9ac1e0a77fa8bc7b7b4729140b11fAffected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before ca92c98b806839c108995b2bbff7061515bdfb53Affected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 81b07470cb2937ceb74b00be88151582a322433bAffected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 6f6d5fe29efdf5001bc146fc292e6592cace93ebAffected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 83c265bfc084d77e2171d4b67362150ab38c935bAffected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 1842e47126816e56d30c4f856f9854fd7831066cAffected
05be1d079ec0b3691783e4384b1ada82149ff7d2 to before 296736076b3fd078742651c719555a488624023aAffected

LinuxLinux

4.0Affected
before 4.0Not affected
5.10.266 through 5.10.*Not affected
5.15.217 through 5.15.*Not affected
6.1.184 through 6.1.*Not affected
6.6.153 through 6.6.*Not affected
6.12.105 through 6.12.*Not affected
6.18.46 through 6.18.*Not affected
7.1.10 through 7.1.*Not affected
7.2 and laterNot affected

References

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