VulnerabilityPublished 5 May 2026Updated 6 Nov 2026

CVE-2026-43064: Linux kernel · dmaengine: idxd: Fix not releasing workqueue on .release()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fc34f199eb576b3a73089452fdf0056cc9a9301d : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:18 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in fc34f199eb576b3a73089452fdf0056cc9a9301d, d02c24af126dee45247dc7890409c86d1831859d, b22fd53b2ceb35445475f0edab13a908c5fb8433 +6

Exploitation evidence

Disclosed: evidence found.
CVE published 5 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=5.11.22 <5.12 >=5.12.5 <5.13	Fixed in fc34f199eb576b3a73089452fdf0056cc9a9301d d02c24af126dee45247dc7890409c86d1831859d b22fd53b2ceb35445475f0edab13a908c5fb8433 958e96533ddbd1edd127feb7624a7eed0cc379dc 70ae35be58d476e2fd9f7a941a5e03b2f5fadb8d 5.13 5.12 3d33de353b1ff9023d5ec73b9becf80ea87af695 2bb9e9e93adff9cc8a138ae9a3a8d59b3452272e
LinuxLinux	Affected =5.13	Fixed in–

AI-suggested

Upgrade to Linux kernel version 5.13 or later, where the fix for this issue has been applied. The vendor has released official fixes in these versions, so applying these updates will remediate the vulnerability.

Description

A vulnerability in the Linux kernel's dmaengine idxd driver caused the workqueue associated with a DSA/IAA device to not be released when the object was freed. This issue has been fixed in Linux kernel versions 5.13 and later.

Impact

The vulnerability results in the workqueue not being released when the associated object is freed, which can cause resource leakage in the kernel. There is no indication of active exploitation or direct security compromise such as privilege escalation or denial of service. The impact is primarily related to resource management and system stability.

Summary

CVE-2026-43064 addresses a resource management flaw in the Linux kernel's dmaengine idxd driver. Specifically, the workqueue tied to a DSA/IAA device was not properly released upon the .release() operation, leading to potential resource leakage. The flaw affects Linux kernel versions from 5.11.22 up to but not including 5.12, versions from 5.12.5 up to but not including 5.13, and version 5.13 exactly. Multiple commits and kernel versions have incorporated fixes to resolve this issue.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Nov 2026, 16:18 UTC

Technical details

References

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