CVE-2026-43136

Kernel crash via fieldless HID report

Published May 6, 2026 · Updated May 6, 2026

NULL pointer dereference in the Linux Kernel HID++ driver allows physically proximate attackers to crash the kernel through a USB device. hidpp_get_report_length() indexes report->field[0] when a crafted HID output report exists but maxfield is zero, leaving no valid field to dereference. Exploitation requires attaching a fake USB gadget that supplies its own malicious HID report descriptor, and the reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux Kernel HID++ driver allows physically proximate attackers to crash the kernel through a USB device. hidpp_get_report_length() indexes report->field[0] when a crafted HID output report exists but maxfield is zero, leaving no valid field to dereference. Exploitation requires attaching a fake USB gadget that supplies its own malicious HID report descriptor, and the reported consequence is a kernel crash.

The record

CVE
CVE-2026-43136
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1547d41f9f19d691c2c9ce4c29f746297baef9e9
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1acb28123e57b50d737377f400f57eec889fe5e4
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2dc023dbc11b8dfa8afa63242762acd8cddcad03
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f59999fcd699af06ad2aef446a635ea6aa87db3
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae81fac9ce81917817d787e6b74e68482d99bdf2
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b74bf7d0d01fa9b53653f58c29aa00772121f6e9
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f1ceaaf93ea32d0f2b95c95f784ee155962c52ad
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb1725c0804dbec9dd01c4cb5c9f1f77a69e36dc

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1547d41f9f19d691c2c9ce4c29f746297baef9e9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1acb28123e57b50d737377f400f57eec889fe5e4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2dc023dbc11b8dfa8afa63242762acd8cddcad03; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f59999fcd699af06ad2aef446a635ea6aa87db3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae81fac9ce81917817d787e6b74e68482d99bdf2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b74bf7d0d01fa9b53653f58c29aa00772121f6e9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f1ceaaf93ea32d0f2b95c95f784ee155962c52ad; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb1725c0804dbec9dd01c4cb5c9f1f77a69e36dc

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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