CVE-2026-43460

Kernel memory corruption via duplicate controller teardown

Published May 8, 2026 · Updated May 8, 2026

Double-free in the Linux Kernel Rockchip SFC SPI driver allows local users to corrupt kernel memory during device removal. The remove() callback manually calls spi_unregister_controller() after devm_spi_register_controller() has scheduled automatic cleanup, causing the controller to be freed twice before its DMA buffer is unmapped. Triggering the vulnerable unbind path requires root or CAP_SYS_ADMIN access to the owner-only sysfs driver unbind file; no unprivileged route is exposed.

CVSS severity7.8
High
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

Double-free in the Linux Kernel Rockchip SFC SPI driver allows local users to corrupt kernel memory during device removal. The remove() callback manually calls spi_unregister_controller() after devm_spi_register_controller() has scheduled automatic cleanup, causing the controller to be freed twice before its DMA buffer is unmapped. Triggering the vulnerable unbind path requires root or CAP_SYS_ADMIN access to the owner-only sysfs driver unbind file; no unprivileged route is exposed.

The record

CVE
CVE-2026-43460
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-415, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=6.14
  2. Affected versionversion=8011709906d0d6ff1ba9589de5a906bf6e430782 <111e2863372c322e836e0c896f6dd9cf4ee08c71
  3. Affected versionversion=8011709906d0d6ff1ba9589de5a906bf6e430782 <85fb53351e6a3b921357a2178671e847a087e400
  4. Affected versionversion=8011709906d0d6ff1ba9589de5a906bf6e430782 <b6051f2bdd4bd3dde85b68558edd3a6843489221

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.14; version=8011709906d0d6ff1ba9589de5a906bf6e430782 <111e2863372c322e836e0c896f6dd9cf4ee08c71; version=8011709906d0d6ff1ba9589de5a906bf6e430782 <85fb53351e6a3b921357a2178671e847a087e400; version=8011709906d0d6ff1ba9589de5a906bf6e430782 <b6051f2bdd4bd3dde85b68558edd3a6843489221

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

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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