Divide by Zero Vulnerability in RT-Thread Parameter Handler Component
CVE-2026-14629

5.3MEDIUM

Key Information:

Vendor

RT-Thread

Status
Rt-thread
Vendor
CVE Published:
4 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-14629?

A vulnerability exists in the RT-Thread operating system up to version 5.2.2, specifically within the Parameter Handler component. The flaw, located in the read/write/sys_ioctl functions of lwp_syscall.c, may allow an attacker to manipulate the execution path, potentially leading to a divide by zero error. This vulnerability can be exploited remotely, making it a significant risk for systems running affected versions. A pull request addressing this issue is currently waiting for approval.

Affected Version(s)

RT-Thread 5.2.0

RT-Thread 5.2.1

RT-Thread 5.2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-14629 - Proof of Concept

References

https://vuldb.com/vuln/376145
vdb-entrytechnical-description
https://vuldb.com/vuln/376145/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-14629
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zephyr Saxon (VulDB User)
VulDB CNA Team
.