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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： 输入：focaltech - 修复 focaltech_process_rel_packet 中的数组越界访问 将 （以及 ）改为无符号类型。这样，当数据包中的手指索引为 0 时，执行减 1 操作会导致数组索引溢出，超过现有的 检查范围（正如现有注释所述），而不是向 写入数据。

CVSS 8.4 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 05be1d079ec0b3691783e4384b1ada82149ff7d2< 063b4c6a6f3fc01bca085c442000c9c100fdbd93 affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< ca92c98b806839c108995b2bbff7061515bdfb53 affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< 81b07470cb2937ceb74b00be88151582a322433b affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< 6f6d5fe29efdf5001bc146fc292e6592cace93eb affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< 83c265bfc084d77e2171d4b67362150ab38c935b affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< 1842e47126816e56d30c4f856f9854fd7831066c affected
05be1d079ec0b3691783e4384b1ada82149ff7d2< 296736076b3fd078742651c719555a488624023a affected
… +10 more rows
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I. Basic Information for CVE-2026-80574

Vulnerability Information
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Vulnerability Title
Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet
Source: CVE Program / CVE List V5
Vulnerability 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].
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 05be1d079ec0b3691783e4384b1ada82149ff7d2 ~ 063b4c6a6f3fc01bca085c442000c9c100fdbd93 -
Linux Linux 4.0 -

II. Public POCs for CVE-2026-80574

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III. Intelligence Information for CVE-2026-80574

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Patches & Fixes for CVE-2026-80574 (6)

Other References for CVE-2026-80574 (2)

Same Patch Batch · Linux · 2026-08-26 · 92 CVEs total

CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80547 8.8 HIGH s390/vfio_ccw: Implement a crw lock
CVE-2026-80576 8.8 HIGH drm/amdgpu: reject oversized IBs with per-ring packet limits
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range

Showing top 20 of 92 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80574

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