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CVE-2026-14629— RT-Thread Parameter lwp_syscall.c sys_ioctl divide by zero

Quick assessment

Affected
n/a RT-Thread
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RT-Thread是RT-Thread组织开源的一个开源物联网实时操作系统(RTOS)。 RT-Thread 5.2.2及之前版本存在安全漏洞，该漏洞源于Parameter Handler组件中components/lwp/lwp_syscall.c文件的read/write/sys_ioctl函数存在除零错误，可能导致拒绝服务。以下版本受到影响：5.2.0版本、5.2.1版本和5.2.2版本。

CVSS 4.3 · Medium EPSS 0.53% · P43

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
n/a RT-Thread 5.2.0 affected
5.2.1 affected
5.2.2 affected
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I. Basic Information for CVE-2026-14629

Vulnerability Information
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Vulnerability Title
RT-Thread Parameter lwp_syscall.c sys_ioctl divide by zero
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in RT-Thread up to 5.2.2. Affected is the function read/write/sys_ioctl of the file components/lwp/lwp_syscall.c of the component Parameter Handler. Executing a manipulation can lead to divide by zero. The attack may be launched remotely. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
除零错误
Source: CVE Program / CVE List V5
Vulnerability Title
RT-Thread 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RT-Thread是RT-Thread组织开源的一个开源物联网实时操作系统(RTOS)。 RT-Thread 5.2.2及之前版本存在安全漏洞，该漏洞源于Parameter Handler组件中components/lwp/lwp_syscall.c文件的read/write/sys_ioctl函数存在除零错误，可能导致拒绝服务。以下版本受到影响：5.2.0版本、5.2.1版本和5.2.2版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- RT-Thread 5.2.0 cpe:2.3:a:rt-thread:rt-thread:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-14629

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III. Intelligence Information for CVE-2026-14629

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Patches & Fixes for CVE-2026-14629 (1)

Vendor Advisories for CVE-2026-14629 (1)

Other References for CVE-2026-14629 (1)

Same Patch Batch · n/a · 2026-07-04 · 6 CVEs total

CVE-2026-14647 4.3 MEDIUM onnx onnxruntime old.cc convPoolShapeInference_opset19 out-of-bounds
CVE-2026-14618 4.3 MEDIUM Open5GS AMF nnrf-handler.c amf_nnrf_handle_nf_discover denial of service
CVE-2026-14685 3.3 LOW HdrHistogram AbstractHistogram AbstractHistogram.java recordValueWithCount state issue
CVE-2026-14684 3.3 LOW HdrHistogram AbstractHistogram.java memory allocation
CVE-2026-14683 3.3 LOW HdrHistogram AbstractHistogram.java memory allocation

IV. Related Vulnerabilities

Same product: RT-Thread
Same vendor: n/a
Same weakness: CWE-369

V. Comments for CVE-2026-14629

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