CVE-2026-43251
Received Received - Intake
HID Input Mapping Null Pointer Dereference in Linux Kernel

Publication date: 2026-05-06

Last updated on: 2026-05-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: HID: prodikeys: Check presence of pm->input_ep82 Fake USB devices can send their own report descriptors for which the input_mapping() hook does not get called. In this case, pm->input_ep82 stays NULL, which leads to a crash later. This does not happen with the real device, but can be provoked by imposing as one.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-06
Generated
2026-05-07
AI Q&A
2026-05-06
EPSS Evaluated
N/A
NVD
CVE-2026-43251
EUVD
EUVD-2026-27812
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux kernel *
linux_kernel linux_kernel *
linux linux_kernel *
linux_kernel prodikeys *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability exists in the Linux kernel's HID prodikeys driver. Fake USB devices can send their own report descriptors, bypassing the input_mapping() hook. As a result, a pointer named pm->input_ep82 remains NULL, which later causes the system to crash. This issue does not occur with genuine devices but can be triggered by devices impersonating them.


How can this vulnerability impact me? :

The vulnerability can lead to a system crash when a fake USB device sends crafted report descriptors. This crash can cause denial of service by destabilizing or interrupting the normal operation of the Linux kernel handling USB input devices.


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