CVE-2026-43015

Local kernel compromise via stale clock pointers

Published May 1, 2026 · Updated May 1, 2026

Use-after-free in the macb PCI glue driver in Linux Kernel allows local users to compromise kernel memory during module removal. macb_remove unregisters clock objects before platform_device_unregister finishes, so a concurrent runtime-resume callback passes freed clock pointers to clk_prepare. Reaching the flaw requires local access and removal of macb_pci during runtime resume; the published trace demonstrates an invalid eight-byte kernel read.

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 the macb PCI glue driver in Linux Kernel allows local users to compromise kernel memory during module removal. macb_remove unregisters clock objects before platform_device_unregister finishes, so a concurrent runtime-resume callback passes freed clock pointers to clk_prepare. Reaching the flaw requires local access and removal of macb_pci during runtime resume; the published trace demonstrates an invalid eight-byte kernel read.

The record

CVE
CVE-2026-43015
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 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=1da750d1e2140ef43d64d17f301ff6f41b45541e
  2. Affected versionversion=46670fb832ee80943715df618632ca13c2e96f2b
  3. Affected versionversion=4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5
  4. Affected versionversion=5.15
  5. Affected versionversion=7721221e87d25c9840d9ca6b986dbdc410d5ce2b <bf64cae913cdd4821f13d5d1d68900c0891bef69
  6. Affected versionversion=a7d521cc726f30b8e679a6f36d04b18a8ab3c536
  7. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57
  8. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae
  9. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <3496fb9e66f79d4def3bb7ec7563e3eaa33a688f
  10. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <67f70841a175fa3469119f52d77a3662c07507a2
  11. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <b3f799cdf830df1782ae463cf15ace35015be99e
  12. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <ce8fe5287b87e24e225c342f3b0ec04f0b3680fe
  13. Affected versionversion=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <f310a836da90d0f0321b14d446c071af63f9ee4c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da750d1e2140ef43d64d17f301ff6f41b45541e; version=46670fb832ee80943715df618632ca13c2e96f2b; version=4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5; version=5.15; version=7721221e87d25c9840d9ca6b986dbdc410d5ce2b <bf64cae913cdd4821f13d5d1d68900c0891bef69; version=a7d521cc726f30b8e679a6f36d04b18a8ab3c536; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <3496fb9e66f79d4def3bb7ec7563e3eaa33a688f; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <67f70841a175fa3469119f52d77a3662c07507a2; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <b3f799cdf830df1782ae463cf15ace35015be99e; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <ce8fe5287b87e24e225c342f3b0ec04f0b3680fe; version=d82d5303c4c539db86588ffb5dc5b26c3f1513e8 <f310a836da90d0f0321b14d446c071af63f9ee4c

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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