CVE-2026-23213

System hang via reset-time MMIO access

Published Feb 18, 2026 · Updated Feb 18, 2026

Denial of service in the AMD GPU power-management driver in affected Linux Kernel builds allows local users to hang or panic the system. During an SMU Mode 1 reset, the driver leaves MMIO access enabled while the ASIC is unreachable over PCIe, so concurrent register access creates uncompleted transactions. The race requires an AMD GPU reset to overlap an interrupt handler or driver thread, and its documented consequence is loss of system availability.

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

Denial of service in the AMD GPU power-management driver in affected Linux Kernel builds allows local users to hang or panic the system. During an SMU Mode 1 reset, the driver leaves MMIO access enabled while the ASIC is unreachable over PCIe, so concurrent register access creates uncompleted transactions. The race requires an AMD GPU reset to overlap an interrupt handler or driver thread, and its documented consequence is loss of system availability.

The record

CVE
CVE-2026-23213
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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 <0de604d0357d0d22cbf03af1077d174b641707b6
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c1853ebbec980d5c05d431bfd6ded73b1363fd00
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0de604d0357d0d22cbf03af1077d174b641707b6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c1853ebbec980d5c05d431bfd6ded73b1363fd00; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162

Published CVSS scores

5.5UbuntuCVSS: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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