CVE-2026-43047
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HID Multitouch Report ID Mismatch Vulnerability

Vulnerability report for CVE-2026-43047, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-05-01

Last updated on: 2026-05-08

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: HID: multitouch: Check to ensure report responses match the request It is possible for a malicious (or clumsy) device to respond to a specific report's feature request using a completely different report ID. This can cause confusion in the HID core resulting in nasty side-effects such as OOB writes. Add a check to ensure that the report ID in the response, matches the one that was requested. If it doesn't, omit reporting the raw event and return early.

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Meta Information

Published
2026-05-01
Last Modified
2026-05-08
Generated
2026-07-06
AI Q&A
2026-05-01
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 12 associated CPEs
Vendor Product Version / Range
linux linux_kernel 4.3.6
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 5.11 (inc) to 5.15.203 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.22 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.168 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.12 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.81 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.134 (exc)
linux linux_kernel From 4.4 (inc) to 5.10.253 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability exists in the Linux kernel's HID multitouch component. It occurs because a malicious or faulty device can respond to a specific feature report request with a completely different report ID than the one requested.

This mismatch can confuse the HID core, potentially leading to harmful side effects such as out-of-bounds (OOB) memory writes.

The fix involves adding a check to ensure that the report ID in the response matches the requested report ID. If they do not match, the raw event is not reported and the process returns early.

Impact Analysis

This vulnerability can lead to out-of-bounds memory writes within the Linux kernel's HID subsystem.

Such memory corruption can cause system instability, crashes, or potentially allow an attacker to execute arbitrary code with kernel privileges.

Therefore, if exploited, it could compromise the security and reliability of systems running vulnerable Linux kernels.

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