CVE-2026-10675

Provisioning denial via invalid-link watchdog resets

Published Jul 21, 2026 · Updated Jul 21, 2026

Denial of service in Zephyr RTOS 3.5.0 through 4.4.1 allows remote attackers to block Bluetooth Mesh provisioning over BLE. PB-ADV prov_msg_recv() resets the protocol watchdog before rejecting an invalidated link, so repeated FCS-valid PDUs prevent timeout cleanup. The attack requires BLE advertising-channel proximity but no authentication or pairing; it blocks provisioning and re-provisioning without affecting confidentiality or integrity.

CVSS severity4.3
Medium
EPSS probability0.25%
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 3.5.0 through 4.4.1 allows remote attackers to block Bluetooth Mesh provisioning over BLE. PB-ADV prov_msg_recv() resets the protocol watchdog before rejecting an invalidated link, so repeated FCS-valid PDUs prevent timeout cleanup. The attack requires BLE advertising-channel proximity but no authentication or pairing; it blocks provisioning and re-provisioning without affecting confidentiality or integrity.

The record

CVE
CVE-2026-10675
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-400, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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=3.5.0 <4.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=3.5.0 <4.5.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.3Zephyr ProjectCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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