Medium severity · published Oct 10, 2025
CVE-2025-11616
Buffer Over-read when receiving improperly sized ICMPv6 packets in FreeRTOS-Plus-TCP
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
A missing validation check in FreeRTOS-Plus-TCP's ICMPv6 packet processing code can lead to an out-of-bounds read when receiving ICMPv6 packets of certain message types which are smaller than the expected size. These issues only affect applications using IPv6.
Users should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRTOS-Plus_TCP · AWS
4.0.0 before 4.3.4 · source: vendor
FR
Freertos-plus-tcp · Amazon
4.0.0 before 4.3.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11616
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11616
Vendor Advisory
https://aws.amazon.com/security/security-bulletins/AWS-2025-023/
Release Notes
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.4
Vendor Advisory
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-8j9h-xjm9-8j6j
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