CVE-2026-43251

Kernel crash via null endpoint dereference

Published May 6, 2026 · Updated May 6, 2026

NULL pointer dereference in Linux Kernel HID prodikeys allows local users to crash the kernel with a fake USB report descriptor. The driver accepts a descriptor that bypasses input_mapping(), leaves pm->input_ep82 unset, and later dereferences that null endpoint. Exploitation requires presenting a device that impersonates supported hardware; the consequence is local availability loss without reported data exposure or modification.

CVSS severity5.5
Medium
EPSS probability0.12%
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 Linux Kernel HID prodikeys allows local users to crash the kernel with a fake USB report descriptor. The driver accepts a descriptor that bypasses input_mapping(), leaves pm->input_ep82 unset, and later dereferences that null endpoint. Exploitation requires presenting a device that impersonates supported hardware; the consequence is local availability loss without reported data exposure or modification.

The record

CVE
CVE-2026-43251
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1200
Attack vector
local
Privileges
authenticated

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 <3f1b21cc67a15d7d081378a9b8747dd000a017b8
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cee8337e1bad168136aecfe6416ecd7d3aa7529a
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d08f35f843881ec504d7537a9bb728a073db3366
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d5512ce892f774d37c53082adadfcad04f21b50e
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e7ac1cd823cd2e9fcbd5cb0b261d6d35dbb79341
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <edccbf7d6dc05d692bde3a89de5a4001f72a0fa4
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee572578f09f0e743e9383393a75c3a7a0f9b4c2
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f580c79683356632f12f2c2029f2fe936d953aa1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f1b21cc67a15d7d081378a9b8747dd000a017b8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cee8337e1bad168136aecfe6416ecd7d3aa7529a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d08f35f843881ec504d7537a9bb728a073db3366; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d5512ce892f774d37c53082adadfcad04f21b50e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e7ac1cd823cd2e9fcbd5cb0b261d6d35dbb79341; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <edccbf7d6dc05d692bde3a89de5a4001f72a0fa4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee572578f09f0e743e9383393a75c3a7a0f9b4c2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f580c79683356632f12f2c2029f2fe936d953aa1

Published CVSS scores

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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