CVE-2026-10670

Local kernel crash via unchecked object lookup

Published Jul 14, 2026 · Updated Jul 14, 2026

NULL-pointer dereference in Zephyr RTOS 2.0.0 through 4.4.0 allows local users to crash or reboot the kernel via a thread-name syscall. The z_vrfy_k_thread_name_copy() verifier calls k_object_find() on a caller-supplied thread pointer but checks thread rather than the returned ko pointer before reading ko->type. Exploitation requires CONFIG_USERSPACE and CONFIG_THREAD_NAME and an unprivileged user-mode thread able to supply a non-NULL, unregistered pointer; the consequence is a system-wide service interrupt.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in Zephyr RTOS 2.0.0 through 4.4.0 allows local users to crash or reboot the kernel via a thread-name syscall. The z_vrfy_k_thread_name_copy() verifier calls k_object_find() on a caller-supplied thread pointer but checks thread rather than the returned ko pointer before reading ko->type. Exploitation requires CONFIG_USERSPACE and CONFIG_THREAD_NAME and an unprivileged user-mode thread able to supply a non-NULL, unregistered pointer; the consequence is a system-wide service interrupt.

The record

CVE
CVE-2026-10670
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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=2.0.0 <4.5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=2.0.0 <4.5.0

Published CVSS scores

5.5Zephyr ProjectCVSS: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 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-476NULL Pointer Dereference
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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