VULNERABILITY INTELLIGENCE

CVE-2026-7424

CVSS score8.1 HIGH
EPSS probability0.22%
CISA KEVNot currently listed
Published2026-04-29
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

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.

Weakness classification

  • ff89ba41-3aa1-4d27-914a-91399e9639e5: CWE-191

Primary references