CVE-2026-31506

Kernel memory corruption via duplicate WoL IRQ release

Published Apr 22, 2026 · Updated Apr 22, 2026

Double free in the Linux kernel's bcmasp driver allows local users with administrative privileges to corrupt kernel memory during device removal. The bcmasp_remove and probe-error paths call free_irq for wol_irq even though devm_request_irq registers the IRQ for automatic devres release. Reaching the removal path requires CAP_SYS_ADMIN or root access to unbind the platform device; the duplicate release can destabilize or crash the kernel.

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

Double free in the Linux kernel's bcmasp driver allows local users with administrative privileges to corrupt kernel memory during device removal. The bcmasp_remove and probe-error paths call free_irq for wol_irq even though devm_request_irq registers the IRQ for automatic devres release. Reaching the removal path requires CAP_SYS_ADMIN or root access to unbind the platform device; the duplicate release can destabilize or crash the kernel.

The record

CVE
CVE-2026-31506
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-415, T1499
Attack vector
local
Privileges
admin

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=6.6
  2. Affected versionversion=a2f0751206b03374f6d02f89c18a60f1bb238fea <121a6ad9cd42ba3bfc57deae93e3326515c2afe1
  3. Affected versionversion=a2f0751206b03374f6d02f89c18a60f1bb238fea <8a30509ce6a29bdf18e0802383c524a7b2357ec0
  4. Affected versionversion=a2f0751206b03374f6d02f89c18a60f1bb238fea <9e5f5c07cc7d66522f8c9676c28605eba5d4a20e
  5. Affected versionversion=a2f0751206b03374f6d02f89c18a60f1bb238fea <cbfa5be2bf64511d49b854a0f9fd6d0b5118621f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.6; version=a2f0751206b03374f6d02f89c18a60f1bb238fea <121a6ad9cd42ba3bfc57deae93e3326515c2afe1; version=a2f0751206b03374f6d02f89c18a60f1bb238fea <8a30509ce6a29bdf18e0802383c524a7b2357ec0; version=a2f0751206b03374f6d02f89c18a60f1bb238fea <9e5f5c07cc7d66522f8c9676c28605eba5d4a20e; version=a2f0751206b03374f6d02f89c18a60f1bb238fea <cbfa5be2bf64511d49b854a0f9fd6d0b5118621f

Published CVSS scores

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

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double 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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