CVE-2026-43072

Local service interruption via unchecked IRQ errors

Published May 5, 2026 · Updated May 5, 2026

Improper error handling in the Linux Kernel VC4 HDMI driver allows local users to cause a service interruption during device initialization. vc4_hdmi_hotplug_init() stored negative platform_get_irq_byname() results in unsigned variables and passed them as IRQ numbers to devm_request_threaded_irq(). The path requires a VC4 HDMI variant with an external IRQ controller and a failed named hot-plug IRQ lookup; public sources do not describe how a local user induces that condition.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper error handling in the Linux Kernel VC4 HDMI driver allows local users to cause a service interruption during device initialization. vc4_hdmi_hotplug_init() stored negative platform_get_irq_byname() results in unsigned variables and passed them as IRQ numbers to devm_request_threaded_irq(). The path requires a VC4 HDMI variant with an external IRQ controller and a failed named hot-plug IRQ lookup; public sources do not describe how a local user induces that condition.

The record

CVE
CVE-2026-43072
Published
May 5, 2026
Updated
May 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0185e0494a561edfc482507f9de89c2ad798b33d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0c1b117f7ba46fb8f6ebc5e0bfe5b58568c301ba
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <63c11b19cdc154fa848a6c3b535bfb1dc7b60378
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9c10b83a004442c93d7a484c3d221a06a45821e1
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e597a809a2b97e927060ba182f58eb3e6101bc70
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ef2ee9db13b68c5e332b77c0a7108a2d4d56e114

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0185e0494a561edfc482507f9de89c2ad798b33d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0c1b117f7ba46fb8f6ebc5e0bfe5b58568c301ba; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <63c11b19cdc154fa848a6c3b535bfb1dc7b60378; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9c10b83a004442c93d7a484c3d221a06a45821e1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e597a809a2b97e927060ba182f58eb3e6101bc70; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ef2ee9db13b68c5e332b77c0a7108a2d4d56e114

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

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

No sourced classifications are available.

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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