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CVE-2026-107837

8.2 · HIGH

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems.

Published Oct 9, 2026CWE-125EPSS 0.38%

Overview

CVE-2026-107837 is a high-severity vulnerability. It was published on October 9, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/RIOT-OS/RIOT/commit/0cae205cd1d110e0b8fce094714598322d56ce2dGitHubgithub.com/RIOT-OS/RIOT/pull/22504GitHubgithub.com/RIOT-OS/RIOT/security/advisories/GHSA-m8mc-q4p7-p8j3

How CyberStrike helps

Frequently asked questions

What is CVE-2026-107837?

CVE-2026-107837 is a high-severity vulnerability. It was published on October 9, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-107837?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-107837?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-107837?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-107837 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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