Medium severity · published Oct 10, 2025
CVE-2025-11618
A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP…
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP version field in the packet header. This issue only affects applications using IPv6.
We recommend upgrading 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:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% 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-2025-11618
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11618
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-6fh9-mqxj-hmwj
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