Medium severity · published Oct 10, 2025
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…
5.4
CVSS
0.3%
EPSS
No
On KEV
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.
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 · Amazon
4.0.0 before 4.3.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11617
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11617
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-wmjr-wm93-cvv2
More from Freertos-plus-tcp
8.1
CVE-2026-7426
Out-of-Bounds Write via Unsanitized Prefix Length in Router Advertisement Processing in FreeRTOS-Plus-TCP
8.1
CVE-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP
8.1
CVE-2024-38373
FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS
6.5
CVE-2026-7425
Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP
6.5
CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP