Description
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. A vulnerability was discovered in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07. When receiving an fragmented IPv6 packet with fragment offset 0 and an empty payload, the payload pointer is set to NULL. However, the implementation still tries to copy the payload into the reassembly buffer, resulting in a NULL pointer dereference which crashes the OS (DoS). To trigger the vulnerability, the `gnrc_ipv6_ext_frag` module must be enabled and the attacker must be able to send arbitrary IPv6 packets to the victim. RIOT OS v2025.10 fixes the issue.
INFO
Published Date :
2025-12-17T19:18:08.696Z
Last Modified :
2025-12-17T20:30:49.970Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2025-66646 vulnerability.
| Vendors | Products |
|---|---|
| Riot-os |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2025-66646.
