# CVE-2025-11617: Buffer Over-read when receiving IPv6 packets with incorrect payload length in FreeRTOS-Plus-TCP

> CVE-2025-11617: Buffer Over-read when receiving IPv6 packets with incorrect payload length in FreeRTOS-Plus-TCP. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-11617
Last updated: 2026-10-08T13:10:00Z

- Published: 2025-10-10 17:10 UTC · Updated: 2026-10-08 13:10 UTC · Assigner: AMZN
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
- EPSS: 0.31%, 23th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-126

## Description

A missing validation check in FreeRTOS-Plus-TCP's IPv6 packet processing code can lead to an out-of-bounds read when receiving a IPv6 packet with incorrect payload lengths in the packet header. This issue only affects applications using IPv6. We recommend users upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.

## Affected vendors and products

- AWS: FreeRTOS-Plus-TCP

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-11617)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-11617)
- [https://aws.amazon.com/security/security-bulletins/AWS-2025-023/](https://aws.amazon.com/security/security-bulletins/AWS-2025-023/)
- [https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.4](https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.4)
- [https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-wmjr-wm93-cvv2](https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-wmjr-wm93-cvv2)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-11617 · Markdown: https://rewindex.com/cve/CVE-2025-11617.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-11617 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:35.247Z