CVE-2026-43430

Service disruption via Yurex probe race

Published May 8, 2026 · Updated May 8, 2026

Race condition in the Yurex USB driver in the Linux Kernel allows local users to disrupt kernel availability during device probing. The yurex_probe function initializes the descriptor's bbu member after submitting an interrupt URB, allowing its completion handler's retrieved value to be overwritten. Exploitation requires local low-privileged access and precise timing during Yurex device initialization; successful triggering corrupts retrieved driver data and disrupts availability.

CVSS severity4.7
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

Race condition in the Yurex USB driver in the Linux Kernel allows local users to disrupt kernel availability during device probing. The yurex_probe function initializes the descriptor's bbu member after submitting an interrupt URB, allowing its completion handler's retrieved value to be overwritten. Exploitation requires local low-privileged access and precise timing during Yurex device initialization; successful triggering corrupts retrieved driver data and disrupts availability.

The record

CVE
CVE-2026-43430
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3cec135415a89723e2d38e1c8cc5098203355965
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <687d26d43a5aaf44323ce7d601cf242bb87e9559
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a875c09899ba0404844abfd8f0d54cdc481c151
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <939e3d17b843b0bae70467fef4481069d73c8520
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a41d3d9202e951995cfac6248c565423079c71fa
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a7934d7202a39c3160aa30521c382c7b744ae4a2
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a8b3b3d730acea1640bc89465f2832cf06a1e13a
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <af83e92c329f11139d5eea2b5b7b83c26c3f67e7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3cec135415a89723e2d38e1c8cc5098203355965; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <687d26d43a5aaf44323ce7d601cf242bb87e9559; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a875c09899ba0404844abfd8f0d54cdc481c151; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <939e3d17b843b0bae70467fef4481069d73c8520; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a41d3d9202e951995cfac6248c565423079c71fa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a7934d7202a39c3160aa30521c382c7b744ae4a2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a8b3b3d730acea1640bc89465f2832cf06a1e13a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <af83e92c329f11139d5eea2b5b7b83c26c3f67e7

Published CVSS scores

5.3SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.8SUSECVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

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 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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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