Vulnerability in Rt-Thread
CVE-2026-14629
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Rt-Thread — versions 5.2.0, 5.2.1, 5.2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/376145 (technical-description, vdb-entry)
- vuldb.com/vuln/376145/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-14629 (third-party-advisory)
- vuldb.com/submit/845610 (third-party-advisory)
- github.com/RT-Thread/rt-thread/issues/11429 (issue-tracking, exploit)
- github.com/RT-Thread/rt-thread/pull/11453 (issue-tracking, patch)
- github.com/RT-Thread/rt-thread/ (product)
Frequently asked questions
- What is CVE-2026-14629?
- CVE-2026-14629 is a medium-severity vulnerability in Rt-Thread, classified under Divide By Zero. CVSS score: 4.3/10. Published 2026-07-04.
- How severe is CVE-2026-14629?
- Medium severity. CVSS v3 base score is 4.3 out of 10.