CVE-2026-31540

Kernel crash via unset submission pointer

Published Apr 24, 2026 · Updated Apr 24, 2026

NULL pointer dereference in the Linux Kernel i915 graphics driver allows local users to crash the kernel during system suspend. The fault occurs in intel_engines_reset_default_submission(), which calls an unset set_default_submission function pointer when i915 firmware binaries are absent. Exploitation requires local low-privileged access, an i915-equipped system without the firmware, and a suspend operation; the demonstrated consequence is a kernel oops and service interruption.

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 the Linux Kernel i915 graphics driver allows local users to crash the kernel during system suspend. The fault occurs in intel_engines_reset_default_submission(), which calls an unset set_default_submission function pointer when i915 firmware binaries are absent. Exploitation requires local low-privileged access, an i915-equipped system without the firmware, and a suspend operation; the demonstrated consequence is a kernel oops and service interruption.

The record

CVE
CVE-2026-31540
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=4.12
  2. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <0162ab3220bac870e43e229e6e3024d1a21c3f26
  3. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <1a16150729db8d997e39519f9d58e6b435c4c087
  4. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <2e20a886b443a71b573ceaed3ca7053d15380916
  5. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <cf4b224ffb9a58181be32b64130fc36cf59c3192
  6. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <da6552d67012a1cf0585f2eb401d0c4abcf108c9
  7. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <db8b1bebe81ffb410ddd746b6869f72e22420850
  8. Affected versionversion=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <df1f4a7d9cf689b4e96c95255228896505f44c31

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.12; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <0162ab3220bac870e43e229e6e3024d1a21c3f26; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <1a16150729db8d997e39519f9d58e6b435c4c087; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <2e20a886b443a71b573ceaed3ca7053d15380916; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <cf4b224ffb9a58181be32b64130fc36cf59c3192; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <da6552d67012a1cf0585f2eb401d0c4abcf108c9; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <db8b1bebe81ffb410ddd746b6869f72e22420850; version=ff44ad51ebf8e4693bd66ae41aa37a6bc88a134f <df1f4a7d9cf689b4e96c95255228896505f44c31

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

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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
T1499Endpoint Denial of Service

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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