Description (CNA)
RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. In 2026.07 and earlier, _receive() in sys/net/gnrc/network_layer/sixlowpan/gnrc_sixlowpan.c can route an undersized packet into SFF fragment handling after only a minimal payload check. The code then interprets the packet as a sixlowpan_frag_t or larger fragment header without verifying that the packet snip contains the required bytes. A remote attacker can send a malformed 6LoWPAN fragment that causes gnrc_sixlowpan_frag_recv() to read beyond the packet buffer, potentially disclosing memory and crashing the network stack. No fixed repository release is available as of this review.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| RIOT-OS / RIOT | affected <= 2026.07 |
CWE
CWE-125
References
- https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3
- https://github.com/RIOT-OS/RIOT/pull/22504
- https://github.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2d
ADP enrichment
No English description supplied.
No references supplied.