CVE-2026-16148

Kernel panic via busy delayable-work reinitialization

Published Sep 14, 2026 · Updated Sep 14, 2026

Denial of service in Zephyr RTOS 3.7.0 through 4.4.1 allows physically proximate attackers to trigger a kernel panic over USB. The it82xx2 driver reinitializes suspended_work during enable while its timeout or queue linkage can remain active, corrupting kernel lists. An unauthenticated USB host must keep suspend detection pending while forcing a disable-and-re-enable cycle; no data exposure or modification is demonstrated.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Zephyr RTOS 3.7.0 through 4.4.1 allows physically proximate attackers to trigger a kernel panic over USB. The it82xx2 driver reinitializes suspended_work during enable while its timeout or queue linkage can remain active, corrupting kernel lists. An unauthenticated USB host must keep suspend detection pending while forcing a disable-and-re-enable cycle; no data exposure or modification is demonstrated.

The record

CVE
CVE-2026-16148
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
T1499
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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=3.7.0 <4.4.2

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=3.7.0 <4.4.2

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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