CVE-2026-14629Public exploit

Kernel crash via unchecked serial ioctl payload

Published Jul 4, 2026 · Updated Jul 4, 2026

Improper input validation in RT-Thread 5.2.0 through 5.2.2 allows local users to crash the kernel through a serial ioctl. sys_ioctl forwards a user-supplied configuration pointer into serial driver code, and the imx6ull-smart UART callback divides the hardware clock by an unchecked zero baud rate. Exploitation requires an RT-Smart process that can open the serial device node and supply a readable configuration with the current buffer size.

CVSS severity4.3
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in RT-Thread 5.2.0 through 5.2.2 allows local users to crash the kernel through a serial ioctl. sys_ioctl forwards a user-supplied configuration pointer into serial driver code, and the imx6ull-smart UART callback divides the hardware clock by an unchecked zero baud rate. Exploitation requires an RT-Smart process that can open the serial device node and supply a readable configuration with the current buffer size.

The record

CVE
CVE-2026-14629
Published
Jul 4, 2026
Updated
Jul 4, 2026
Vendor
RT-Thread
Product
RT-Thread
Classifications
CWE-404, CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 4, 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=5.2.0
  2. Affected versionversion=5.2.1
  3. Affected versionversion=5.2.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

RT-Thread · RT-Threadversion=5.2.0; version=5.2.1; version=5.2.2

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.0VulDBAV:N/AC:L/Au:S/C:N/I:N/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-369Divide By Zero
T1499.004Application or System Exploitation

Public exploit references

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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