CVE-2026-31441

Local service interruption via premature cleanup-state assignment

Published Apr 22, 2026 · Updated Apr 22, 2026

Memory leak in the idxd DMA driver in affected Linux Kernel releases allows local users to exhaust memory by resetting a workqueue. During idxd_wq_disable_cleanup(), the reset path assigns type NONE before releasing resources, so other driver paths treat the queue as already empty and skip release. Reachability requires local low-privileged access to the idxd workqueue reset path; repeated resets can deplete memory and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory leak in the idxd DMA driver in affected Linux Kernel releases allows local users to exhaust memory by resetting a workqueue. During idxd_wq_disable_cleanup(), the reset path assigns type NONE before releasing resources, so other driver paths treat the queue as already empty and skip release. Reachability requires local low-privileged access to the idxd workqueue reset path; repeated resets can deplete memory and interrupt service.

The record

CVE
CVE-2026-31441
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=2a2df2bd10de44c3804661ed15157817c12d6291
  2. Affected versionversion=5.8
  3. Affected versionversion=da32b28c95a79e399e18c03f8178f41aec9c66e4 <0c3d3ac57e3c52b570b8c695903306bff07e04c8
  4. Affected versionversion=da32b28c95a79e399e18c03f8178f41aec9c66e4 <39c1504e0e76bcfb93991fd94288a83e05d13b51
  5. Affected versionversion=da32b28c95a79e399e18c03f8178f41aec9c66e4 <54d77cc0c40ca2f894859dc7b3c52997574f1a2a
  6. Affected versionversion=da32b28c95a79e399e18c03f8178f41aec9c66e4 <a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658
  7. Affected versionversion=da32b28c95a79e399e18c03f8178f41aec9c66e4 <a9e7815d38629bcf59d3005001f1f315424a58de
  8. Affected versionversion=da32b28c95a79e399e18c03f8178f41aec9c66e4 <d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2a2df2bd10de44c3804661ed15157817c12d6291; version=5.8; version=da32b28c95a79e399e18c03f8178f41aec9c66e4 <0c3d3ac57e3c52b570b8c695903306bff07e04c8; version=da32b28c95a79e399e18c03f8178f41aec9c66e4 <39c1504e0e76bcfb93991fd94288a83e05d13b51; version=da32b28c95a79e399e18c03f8178f41aec9c66e4 <54d77cc0c40ca2f894859dc7b3c52997574f1a2a; version=da32b28c95a79e399e18c03f8178f41aec9c66e4 <a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658; version=da32b28c95a79e399e18c03f8178f41aec9c66e4 <a9e7815d38629bcf59d3005001f1f315424a58de; version=da32b28c95a79e399e18c03f8178f41aec9c66e4 <d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478

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.

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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.001OS Exhaustion Flood

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo