CVE-2026-10684

Memory disclosure or crash via unchecked target code

Published Jul 29, 2026 · Updated Jul 29, 2026

Out-of-bounds read in Zephyr RTOS 4.2.0 through 4.3.0 and 4.4.0 through 4.4.1 allows local users to read memory or crash the system. The print_coredump_hdr() function uses an unvalidated 16-bit tgt_code value to index a seven-entry string-pointer array, then passes the resulting pointer to shell_print(). Exploitation requires shell access and the ability to stage or corrupt a stored coredump; normal device-generated target codes are in range.

CVSS severity3.0
Low
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Zephyr RTOS 4.2.0 through 4.3.0 and 4.4.0 through 4.4.1 allows local users to read memory or crash the system. The print_coredump_hdr() function uses an unvalidated 16-bit tgt_code value to index a seven-entry string-pointer array, then passes the resulting pointer to shell_print(). Exploitation requires shell access and the ability to stage or corrupt a stored coredump; normal device-generated target codes are in range.

The record

CVE
CVE-2026-10684
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-125, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=4.2.0 <4.3.1
  2. Affected versionversion=4.4.0 <=4.4.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Zephyr Project · Zephyr RTOSversion=4.2.0 <4.3.1; version=4.4.0 <=4.4.1

Published CVSS scores

3.0Zephyr ProjectCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1005Data from Local System

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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