CVE-2026-43298

Service interruption via invalid VCN IRQ release

Published May 8, 2026 · Updated May 8, 2026

Availability flaw in the Linux Kernel allows local users to interrupt service during AMDGPU VCN 2.5 virtual-function deinitialization. The VCN 2.5 teardown path calls amdgpu_irq_put for a poison interrupt that virtual functions never enabled, triggering a kernel warning and call trace. Reachability requires a Linux host using an AMDGPU VCN 2.5 virtual function; the record does not disclose how a low-privileged local user initiates teardown.

CVSS severity5.5
Medium
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

Availability flaw in the Linux Kernel allows local users to interrupt service during AMDGPU VCN 2.5 virtual-function deinitialization. The VCN 2.5 teardown path calls amdgpu_irq_put for a poison interrupt that virtual functions never enabled, triggering a kernel warning and call trace. Reachability requires a Linux host using an AMDGPU VCN 2.5 virtual function; the record does not disclose how a low-privileged local user initiates teardown.

The record

CVE
CVE-2026-43298
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8980be03b3f9a4b58197ef95d3b37efa41a25331
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8ee9aa80d4f1893a6699d46c403a1731548b544b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f1db6fc5a834c8ca9485cc0596dd7df8b8619b64

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8980be03b3f9a4b58197ef95d3b37efa41a25331; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8ee9aa80d4f1893a6699d46c403a1731548b544b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f1db6fc5a834c8ca9485cc0596dd7df8b8619b64

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Canonical UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499.004Application 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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