CVEvulnerability

CVE-2026-49868

9.8 CRITICAL Published 2026-10-16 Modified 2026-10-21 Official page ↗
Status
Deferred
Published
2026-10-16
Last modified
2026-10-21
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-125, CWE-191

Description

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, _parse_reply() in sys/net/application_layer/dhcpv6/client.c omits minimum-length validation before passing IA_PD and IA_NA option bodies to sub-option parsers. A malicious or compromised DHCPv6 server can send a REPLY with an option length smaller than the required structure while MODULE_DHCPV6_CLIENT_IA_PD is enabled, causing _parse_ia_pd_option to read past the option body, size_t underflow, and unbounded out-of-bounds heap reads that can crash the device and may expose or corrupt memory. This issue is fixed in version 2026.07.

Related

Weakness · CWE (2)

  • CWE-125 Out-of-bounds Read weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References