CVE-2026-14629 RT-Thread Parameter lwp_syscall.c sys_ioctl divide by zero
A divide-by-zero flaw in RT-Thread's syscall handler allows remote attackers to cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-14629?
CVE-2026-14629 is a medium-severity denial of service vulnerability in RT-Thread, published on 4 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-14629?
How do I fix CVE-2026-14629?
No fix has been published for CVE-2026-14629 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-14629 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14629 exists.
Sources
Also known as GHSA-jp84-4rqr-29c5.