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TI-2026-06528 Aliases CVE-2026-7425

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

Priority LOW 26CWE-125Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00233 14th percentileScored 2026-11-07
Fix Fixed FreeRTOS-Plus-TCP (AWS): 4.2.6, 4.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AWSFreeRTOS-Plus-TCP4.0.0 to before 4.2.6; 4.3.0 to before 4.4.14.2.6, 4.4.1Patch availableCNA
  • FreeRTOS-Plus-TCP VendorAWS Affected 4.0.0 to before 4.2.6; 4.3.0 to before 4.4.1 Fixed in 4.2.6, 4.4.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*4.0.0 to before 4.2.6; 4.3.0 to before 4.4.1VulnerableAWS
  • cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.2.6; 4.3.0 to before 4.4.1 Vulnerable ·AWS

Remediation

  • Fix · CNA FreeRTOS-Plus-TCP (AWS) Fixed in 4.2.6, 4.4.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    AWS FreeRTOS-Plus-TCP — aws.amazon.com/security/security-bulletins/2026-023-aws

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-06529 Out-of-Bounds Write via Unsanitized Prefix Length in Router Advertisement Processing in FreeRTOS-Plus-TCPPriority LOW 27
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7425

References

Patch 3

Advisory 1

  • TI-2024-25630 FreeRTOS-Plus-TCP Buffer Over-Read in DNS Response Parser CVSS 3.1CRITICAL 9.6
  • TI-2026-06527 Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP CVSS 4.0HIGH 7.2
  • TI-2026-06525 MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing CVSS 4.0HIGH 7.1
  • TI-2026-06529 Out-of-Bounds Write via Unsanitized Prefix Length in Router Advertisement Processing in FreeRTOS-Plus-TCP CVSS 4.0MEDIUM 6.1
  • TI-2026-06526 Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP CVSS 4.0MEDIUM 6.0
  • TI-2025-10648 Invalid Pointer Dereference when receiving UDP/IPv6 packets in FreeRTOS-Plus-TCP CVSS 4.0MEDIUM 5.3
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences