CVE-2026-7424

HIGH EPSS 12.8%
Published Apr 29, 20262mo ago · Modified Jun 17, 20262w ago
7.2 CVSS 4.0
High
Find Similar
Published Apr 29, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service (permanent IP task freeze requiring hardware reset) by sending a single crafted DHCPv6 packet. The issue is present whenever DHCPv6 is enabled. To mitigate this issue, users should upgrade to version V4.2.6 or V4.4.1 or newer.

CVSS Details

Base Score
7.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
12.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-191

Affected Products 2

VendorProductVersionRange
amazonfreertos-plus-tcp*≥4.0.0  –  <4.2.6
amazonfreertos-plus-tcp*≥4.3.0  –  <4.4.1

References 4

  • aws.amazon.com https://aws.amazon.com/security/security-bulletins/2026-022-aws/
    Vendor Advisory
  • github.com https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6
    Release Notes
  • github.com https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1
    Release Notes
  • github.com https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-wrhm-c99p-2p8g
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.