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CVE-2026-80566— Input: hynitron_cstxxx - validate touch count and finger IDs

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.

以下是该漏洞描述信息的中文翻译： 在 Linux 内核中，以下漏洞已得到修复： 输入驱动：hynitron_cstxxx - 校验触摸次数与手指 ID 该驱动分配了 个输入槽位（input slots），其索引范围是从 0 到 。当前的检查允许等于 的手指 ID 到达 函数。虽然输入核心（input core）会忽略超出范围的槽位索引，但在没有有效槽位变更的情况下报告触摸数据，会破坏先前激活槽位的触摸状态。 触摸次数（touch count）是从控制器的报告（report）中读取的，并被用于索引固定大小的报告缓冲区

AI Predicted 5.5 Difficulty: Moderate

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 66603243f5283f7f28c795f09e7c2167233df0bd< ec61ca4e310665816a639cb2e46cd9b3af0a9bee affected
66603243f5283f7f28c795f09e7c2167233df0bd< 387829ee60de26c7c073ed4e27ecfab2b75d4c74 affected
66603243f5283f7f28c795f09e7c2167233df0bd< 38e7d5c1ade04b99c70da0298ca296ee62bc99c0 affected
66603243f5283f7f28c795f09e7c2167233df0bd< 51c5503554c87e4de4035468bebf186205391ce9 affected
66603243f5283f7f28c795f09e7c2167233df0bd< 27f380ef0e1d3de3cde114e02d33f9320ce3a5a6 affected
6.2 affected
< 6.2 unaffected
6.6.153≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-80566

Vulnerability Information
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Vulnerability Title
Input: hynitron_cstxxx - validate touch count and finger IDs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Input: hynitron_cstxxx - validate touch count and finger IDs The driver allocates max_touch_num input slots, which are indexed from zero through max_touch_num - 1. The current check allows a finger ID equal to max_touch_num to reach cst3xx_report_contact(). While the input core ignores out-of-range slot indices, reporting touch data without a valid slot change corrupts the touch state of the previously active slot. The touch count is read from the controller's report and is used to index the fixed-size report buffer without first checking its range. Reject counts larger than the supported number of touch slots before checking the trailing byte or parsing touch data. Reject finger IDs equal to or greater than max_touch_num, and return immediately when an invalid finger ID is encountered so that corrupt touch frames are discarded instead of reporting partial contact state. The V821 Avaota F1 board configures the vendor driver with one touch slot, so finger ID 1 is already invalid on that device.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 66603243f5283f7f28c795f09e7c2167233df0bd ~ ec61ca4e310665816a639cb2e46cd9b3af0a9bee -
Linux Linux 6.2 -

II. Public POCs for CVE-2026-80566

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III. Intelligence Information for CVE-2026-80566

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Patches & Fixes for CVE-2026-80566 (5)

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

CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80576 8.8 HIGH drm/amdgpu: reject oversized IBs with per-ring packet limits

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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