CVE-2026-7425 PUBLISHED

Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP

Assigner: AMZN
Reserved: 29.04.2026 Published: 29.04.2026 Updated: 29.04.2026

Insufficient option length validation in the IPv6 Router Advertisement parser in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause a denial of service (device crash) by sending a crafted Router Advertisement with a truncated PREFIX_INFORMATION option that is smaller than the expected structure size.

To mitigate this issue, users should upgrade to the fixed version when available.

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 6.5

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	AWS
Product	FreeRTOS-Plus-TCP
Versions	Default: unaffected affected from 4.0.0 to 4.2.6 (excl.) affected from 4.3.0 to 4.4.1 (excl.) Version 4.2.6 is unaffected Version 4.4.1 is unaffected

CVE-2026-7425 PUBLISHED

Out-of-Bounds Read in Router Advertisement Option Parser in FreeRTOS-Plus-TCP

Metrics

Product Status

References

Problem Types

Impacts