CVE-2026-43446

Device hang via runtime-suspend workqueue deadlock

Published May 8, 2026 · Updated May 8, 2026

Improper locking in the Linux kernel amdxdna driver before 6.19.9 allows local users to hang the device during runtime suspend. The suspend callback drains the running-job workqueue while a job can call pm_runtime_resume_and_get(), creating a circular wait between resume and suspend. A low-privileged local user must submit work to an AMD XDNA device as runtime suspension begins; the deadlock interrupts device availability without reported data exposure or modification.

CVSS severity5.5
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel amdxdna driver before 6.19.9 allows local users to hang the device during runtime suspend. The suspend callback drains the running-job workqueue while a job can call pm_runtime_resume_and_get(), creating a circular wait between resume and suspend. A low-privileged local user must submit work to an AMD XDNA device as runtime suspension begins; the deadlock interrupts device availability without reported data exposure or modification.

The record

CVE
CVE-2026-43446
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, 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

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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=063db451832b8849faf1b0b8404b3a6a39995b29 <6b13cb8f48a42ddf6dd98865b673a82e37ff238b
  2. Affected versionversion=063db451832b8849faf1b0b8404b3a6a39995b29 <ac72e7385a2c7533dd766de4197134d96230be85
  3. Affected versionversion=6.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=063db451832b8849faf1b0b8404b3a6a39995b29 <6b13cb8f48a42ddf6dd98865b673a82e37ff238b; version=063db451832b8849faf1b0b8404b3a6a39995b29 <ac72e7385a2c7533dd766de4197134d96230be85; version=6.19

Published CVSS scores

5.7Canonical UbuntuCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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

CWE-667Improper Locking
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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