CVE-2025-11616

Buffer Over-read when receiving improperly sized ICMPv6 packets in FreeRTOS-Plus-TCP

MEDIUM
5.4
CVSS Score
Published: October 10, 2025 at 05:10 PM UTC
Updated: October 8, 2026 at 01:10 PM UTC
2 products affected across 2 vendorsFreertos Plus TCPFreeRTOS-Plus-TCP

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.0.0 ≤ v < 4.3.4*
4.0.0 ≤ v < 4.3.44.0.0
Affected range stops below 4.3.4, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMAMZN
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-126

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