CVE-2026-43231

Service interruption via leaked V4L2 control handler

Published May 6, 2026 · Updated May 6, 2026

Memory leak in the Linux Kernel radio-keene driver allows local users to consume kernel memory by triggering device-probe failures. In usb_keene_probe(), the err_v4l2 path returns after v4l2_device_register() or video_register_device() fails without freeing the initialized V4L2 control handler. Exploitation requires local access and repeated probe failures for the Keene FM radio USB device, eventually causing a service interrupt through memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux Kernel radio-keene driver allows local users to consume kernel memory by triggering device-probe failures. In usb_keene_probe(), the err_v4l2 path returns after v4l2_device_register() or video_register_device() fails without freeing the initialized V4L2 control handler. Exploitation requires local access and repeated probe failures for the Keene FM radio USB device, eventually causing a service interrupt through memory exhaustion.

The record

CVE
CVE-2026-43231
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=1bf20c3a0c616f44359c573b533d06bae960ee45 <1d8558a232ecb187e8e0328d6347a125f437a0fc
  2. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <242b0aabb1866024a7995a767ac330c158b39aa4
  3. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <27c508f61963013fdf29097578284099ee7a85a4
  4. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <2fe28a63d598235595a9601e0d8fdc7c8f4fd575
  5. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <7fa9754f48cb8eefa566156be341e63d313247e5
  6. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <ad85bb5623079a35bd400f51de2e2fbc2170bdb2
  7. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <b8bf939d77c0cd01118e953bbf554e0fa15e9006
  8. Affected versionversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <de204d87e7d61859937272fe30cbdd46a4cfb10a
  9. Affected versionversion=3.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1bf20c3a0c616f44359c573b533d06bae960ee45 <1d8558a232ecb187e8e0328d6347a125f437a0fc; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <242b0aabb1866024a7995a767ac330c158b39aa4; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <27c508f61963013fdf29097578284099ee7a85a4; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <2fe28a63d598235595a9601e0d8fdc7c8f4fd575; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <7fa9754f48cb8eefa566156be341e63d313247e5; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <ad85bb5623079a35bd400f51de2e2fbc2170bdb2; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <b8bf939d77c0cd01118e953bbf554e0fa15e9006; version=1bf20c3a0c616f44359c573b533d06bae960ee45 <de204d87e7d61859937272fe30cbdd46a4cfb10a; version=3.4

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

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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
T1499Endpoint Denial of Service

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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