Vulnerability in Amazon Freertos-Plus-Tcp
CVE-2025-11617
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (20.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Amazon Freertos-Plus-Tcp
- AWS Freertos-Plus-Tcp — versions 4.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (product, Release Notes, patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory, Vendor Advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (Vendor Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-11617?
- CVE-2025-11617 is a medium-severity vulnerability in Amazon Freertos-Plus-Tcp, classified under Buffer Over-read. CVSS score: 5.4/10. Published 2025-10-10.
- How severe is CVE-2025-11617?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2025-11617 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.