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CVE-2026-93826— HID: hidpp: fix potential UAF in hidpp_connect_event()

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，已修复以下漏洞： HID: hidpp: 修复 hidpp_connect_event() 中潜在的 UAF（释放后使用）漏洞 如果 input_register_device() 调用失败，系统会调用 input_free_device() 释放设备，但 hidpp->input 中仍保留了指向已释放设备的悬空指针，这可能导致 UAF（Use-After-Free）漏洞。通过在从 hidpp_connect_event() 返回之前将该指针重置为 NULL，修复了此问题。

CVSS 7.5 · High EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux c39e3d5fc9dd3e16c6f59dd94d827540040de66d< e03fd646adad7f97fa4429ec5f38cee9bde5276e affected
c39e3d5fc9dd3e16c6f59dd94d827540040de66d< 5d7637f4d050d105177217e64b869f56f9825060 affected
c39e3d5fc9dd3e16c6f59dd94d827540040de66d< 3b8b2e58b078cd30e121401535541bb8a6d57133 affected
c39e3d5fc9dd3e16c6f59dd94d827540040de66d< 3303398cc2aa255ba251650a30024e11d48ea6c3 affected
c39e3d5fc9dd3e16c6f59dd94d827540040de66d< 6df6b1f2c49678211f65647c300bc51dda02893b affected
3.19 affected
< 3.19 unaffected
6.1.189≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-93826

Vulnerability Information
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Vulnerability Title
HID: hidpp: fix potential UAF in hidpp_connect_event()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: hidpp: fix potential UAF in hidpp_connect_event() If input_register_device() fails, we call input_free_device(), but keep stale pointer to the old device in hidpp->input, which could potentially lead to UAF. Fix that by resetting it to NULL before returning from hidpp_connect_event().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/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 c39e3d5fc9dd3e16c6f59dd94d827540040de66d ~ e03fd646adad7f97fa4429ec5f38cee9bde5276e -
Linux Linux 3.19 -

II. Public POCs for CVE-2026-93826

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III. Intelligence Information for CVE-2026-93826

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Patches & Fixes for CVE-2026-93826 (5)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93221 8.1 HIGH nfsd: convert nfsd_net boolean flags to unsigned long flags word
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-93826

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