CVE-2026-31485

Kernel crash via SPI teardown use-after-free

Published Apr 22, 2026 · Updated Apr 22, 2026

Use-after-free in Linux Kernel branches from 4.10 allows local users to crash the kernel during an SPI controller teardown. The fsl_lpspi driver delays controller unregistration until after fsl_lpspi_remove() synchronously releases its DMA channels, so an in-flight transfer dereferences freed state. Triggering the fault requires local access to the affected SPI device and a transfer concurrent with device removal; the published trace demonstrates a NULL-pointer kernel crash.

CVSS severity7.8
High
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

Use-after-free in Linux Kernel branches from 4.10 allows local users to crash the kernel during an SPI controller teardown. The fsl_lpspi driver delays controller unregistration until after fsl_lpspi_remove() synchronously releases its DMA channels, so an in-flight transfer dereferences freed state. Triggering the fault requires local access to the affected SPI device and a transfer concurrent with device removal; the published trace demonstrates a NULL-pointer kernel crash.

The record

CVE
CVE-2026-31485
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=4.10
  2. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <15650dfbaeeb14bcaaf053b93cf631db8d465300
  3. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <adb25339b66112393fd6892ceff926765feb5b86
  4. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <b341c1176f2e001b3adf0b47154fc31589f7410e
  5. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <ca4483f36ac1b62e69f8b182c5b8f059e0abecfb
  6. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <d5d01f24bc6fbde40b4e567ef9160194b61267bc
  7. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <e3fd54f8b0317fbccc103961ddd660f2a32dcf0b
  8. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3
  9. Affected versionversion=5314987de5e5f5e38436ef4a69328bc472bbd63e <fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.10; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <15650dfbaeeb14bcaaf053b93cf631db8d465300; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <adb25339b66112393fd6892ceff926765feb5b86; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <b341c1176f2e001b3adf0b47154fc31589f7410e; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <ca4483f36ac1b62e69f8b182c5b8f059e0abecfb; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <d5d01f24bc6fbde40b4e567ef9160194b61267bc; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <e3fd54f8b0317fbccc103961ddd660f2a32dcf0b; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3; version=5314987de5e5f5e38436ef4a69328bc472bbd63e <fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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