CVE-2026-10659

Kernel crash via NULL error-pointer write

Published Jul 7, 2026 · Updated Jul 7, 2026

NULL pointer dereference in the Dhara FTL disk driver in Zephyr RTOS 4.4.0 allows local users to crash the kernel during initialization. The dhara_nand_read callback unconditionally writes an ECC error through a caller-supplied error pointer that journal resume passes as NULL. Exploitation requires a Dhara FTL mount and a read error on a probed checkpoint page, causing a kernel fault and service interruption.

CVSS severity4.7
Medium
EPSS probability0.13%
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 the Dhara FTL disk driver in Zephyr RTOS 4.4.0 allows local users to crash the kernel during initialization. The dhara_nand_read callback unconditionally writes an ECC error through a caller-supplied error pointer that journal resume passes as NULL. Exploitation requires a Dhara FTL mount and a read error on a probed checkpoint page, causing a kernel fault and service interruption.

The record

CVE
CVE-2026-10659
Published
Jul 7, 2026
Updated
Jul 7, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-476, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 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=4.4.0 <4.5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=4.4.0 <4.5.0

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Zephyr ProjectCVSS:3.1/AV:L/AC:H/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
T1529System Shutdown/Reboot

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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