From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-cve-announce@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@kernel.org>
Subject: CVE-2026-80574: Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet
Date: Wed, 26 Aug 2026 16:38:10 +0200 [thread overview]
Message-ID: <2026082613-CVE-2026-80574-72f3@gregkh> (raw)
From: Greg Kroah-Hartman <gregkh@kernel.org>
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].
The Linux kernel CVE team has assigned CVE-2026-80574 to this issue.
Affected and fixed versions
===========================
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 5.10.266 with commit 063b4c6a6f3fc01bca085c442000c9c100fdbd93
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 5.15.217 with commit bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 6.1.184 with commit ca92c98b806839c108995b2bbff7061515bdfb53
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 6.6.153 with commit 81b07470cb2937ceb74b00be88151582a322433b
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 6.12.105 with commit 6f6d5fe29efdf5001bc146fc292e6592cace93eb
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 6.18.46 with commit 83c265bfc084d77e2171d4b67362150ab38c935b
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 7.1.10 with commit 1842e47126816e56d30c4f856f9854fd7831066c
Issue introduced in 4.0 with commit 05be1d079ec0b3691783e4384b1ada82149ff7d2 and fixed in 7.2 with commit 296736076b3fd078742651c719555a488624023a
Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.
Unaffected versions might change over time as fixes are backported to
older supported kernel versions. The official CVE entry at
https://cve.org/CVERecord/?id=CVE-2026-80574
will be updated if fixes are backported, please check that for the most
up to date information about this issue.
Affected files
==============
The file(s) affected by this issue are:
drivers/input/mouse/focaltech.c
Mitigation
==========
The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes. Individual
changes are never tested alone, but rather are part of a larger kernel
release. Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all. If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
https://git.kernel.org/stable/c/063b4c6a6f3fc01bca085c442000c9c100fdbd93
https://git.kernel.org/stable/c/bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f
https://git.kernel.org/stable/c/ca92c98b806839c108995b2bbff7061515bdfb53
https://git.kernel.org/stable/c/81b07470cb2937ceb74b00be88151582a322433b
https://git.kernel.org/stable/c/6f6d5fe29efdf5001bc146fc292e6592cace93eb
https://git.kernel.org/stable/c/83c265bfc084d77e2171d4b67362150ab38c935b
https://git.kernel.org/stable/c/1842e47126816e56d30c4f856f9854fd7831066c
https://git.kernel.org/stable/c/296736076b3fd078742651c719555a488624023a
reply other threads:[~2026-08-26 14:40 UTC|newest]
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