CVE-2026-23312

Host crash via unchecked USB endpoints

Published Mar 25, 2026 · Updated Mar 25, 2026

Improper USB endpoint validation in the Linux Kernel kaweth driver allows physically proximate attackers to crash the host. The kaweth_probe function binds without confirming the expected bulk-IN, bulk-OUT, and interrupt-IN endpoints, then later accesses absent endpoints. Exploitation requires attaching a malformed USB device that matches the driver, and the resulting kernel failure interrupts the entire host.

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

What happened

Improper USB endpoint validation in the Linux Kernel kaweth driver allows physically proximate attackers to crash the host. The kaweth_probe function binds without confirming the expected bulk-IN, bulk-OUT, and interrupt-IN endpoints, then later accesses absent endpoints. Exploitation requires attaching a malformed USB device that matches the driver, and the resulting kernel failure interrupts the entire host.

The record

CVE
CVE-2026-23312
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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 <0aae18e4638a7c1c579df92bc6edc36cedfaaa8c
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2795fc06e7652c0ba299d936c584d5e08b6b57a1
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4b063c002ca759d1b299988ee23f564c9609c875
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72f90f481c6a059680b9b976695d4cfb04fba1f3
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7c7ebf5e45d2504d92ea294ac3828d58586491df
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f33e80d195a003b384620ee240f69092b519146b
  7. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0aae18e4638a7c1c579df92bc6edc36cedfaaa8c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2795fc06e7652c0ba299d936c584d5e08b6b57a1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4b063c002ca759d1b299988ee23f564c9609c875; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72f90f481c6a059680b9b976695d4cfb04fba1f3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7c7ebf5e45d2504d92ea294ac3828d58586491df; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f33e80d195a003b384620ee240f69092b519146b; version=2.6.12

Published CVSS scores

5.5NVDCVSS: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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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