Executive Summary

This vulnerability exists in the RIOT operating system, specifically in versions 2025.10 and earlier. It involves multiple out-of-bounds read issues in the 6LoWPAN stack, which is used for Internet of Things (IoT) and embedded devices. An unauthenticated attacker who can send or manipulate input packets can exploit this flaw to read adjacent memory locations or cause the device to crash. The problem arises because the received packet is cast into a specific data structure (sixlowpan_sfr_rfrag_t) without verifying that the packet is large enough to safely contain this structure.

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Impact Analysis

This vulnerability can have serious impacts including unauthorized reading of memory, which may expose sensitive information, and causing the device to crash, leading to denial of service. Since the attacker does not need to be authenticated, any user capable of sending or manipulating packets can exploit this issue, potentially compromising the availability and confidentiality of affected IoT or embedded devices running the vulnerable 6LoWPAN stack.

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Compliance Impact

I don't know

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Detection Guidance

I don't know

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Mitigation Strategies

At the time of publication, no known patch exists for this vulnerability.

Since the vulnerability allows unauthenticated users to cause out-of-bounds reads or crashes via manipulated input packets in the 6LoWPAN stack, immediate mitigation steps include restricting or monitoring network access to devices running the vulnerable RIOT versions (2025.10 and prior) to prevent untrusted input packets.

Additionally, consider isolating vulnerable devices from untrusted networks and applying network-level filtering to block suspicious 6LoWPAN packets.

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