CVE-2024-25395Network attack vector

Memory corruption via unchecked rt-link frame length

Published Mar 27, 2024 · Updated Nov 4, 2025

Buffer overflow in RT-Thread through 5.0.2 allows remote authenticated users to corrupt memory through oversized rt-link data frames. The frame_send() function copies frame->data_len bytes from real_data into a 1,024-byte static send buffer without checking the total frame size. Reachability requires a low-privileged rt-link path; the public analysis establishes memory corruption but does not demonstrate a resulting crash or code execution.

CVSS severity8.8
High
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in RT-Thread through 5.0.2 allows remote authenticated users to corrupt memory through oversized rt-link data frames. The frame_send() function copies frame->data_len bytes from real_data into a 1,024-byte static send buffer without checking the total frame size. Reachability requires a low-privileged rt-link path; the public analysis establishes memory corruption but does not demonstrate a resulting crash or code execution.

The record

CVE
CVE-2024-25395
Published
Mar 27, 2024
Updated
Nov 4, 2025
Vendor
RT-Thread
Product
RT-Thread
Classifications
CWE-120
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=- <=5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RT-Thread · RT-Threadversion=- <=5.0.2

Published CVSS scores

8.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo