CVE-2026-23467

Kernel crash via uninitialized DMC pointer dereference

Published Apr 3, 2026 · Updated Apr 3, 2026

NULL pointer dereference in Linux Kernel 6.16 through 6.18.19 and 6.19 through 6.19.9 allows local users to crash the kernel. intel_dmc_update_dc6_allowed_count() follows the hardware DC6 state and dereferences dmc before intel_dmc_init() has initialized it. The crash requires BIOS to leave DC6 enabled at boot; the record reports no confidentiality or integrity impact and no method for a user to create that firmware state.

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 6.16 through 6.18.19 and 6.19 through 6.19.9 allows local users to crash the kernel. intel_dmc_update_dc6_allowed_count() follows the hardware DC6 state and dereferences dmc before intel_dmc_init() has initialized it. The crash requires BIOS to leave DC6 enabled at boot; the record reports no confidentiality or integrity impact and no method for a user to create that firmware state.

The record

CVE
CVE-2026-23467
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 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=6.16
  2. Affected versionversion=88c1f9a4d36de61f87cc52aac670020b13d1ccaa <0b35d11fbbcfd1079c8489282a341944228835e3
  3. Affected versionversion=88c1f9a4d36de61f87cc52aac670020b13d1ccaa <631317825d44283abfe7a8374f13a76ce2032bb8
  4. Affected versionversion=88c1f9a4d36de61f87cc52aac670020b13d1ccaa <ac57eb3b7d2ad649025b5a0fa207315f755ac4f6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.16; version=88c1f9a4d36de61f87cc52aac670020b13d1ccaa <0b35d11fbbcfd1079c8489282a341944228835e3; version=88c1f9a4d36de61f87cc52aac670020b13d1ccaa <631317825d44283abfe7a8374f13a76ce2032bb8; version=88c1f9a4d36de61f87cc52aac670020b13d1ccaa <ac57eb3b7d2ad649025b5a0fa207315f755ac4f6

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

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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