Is CVE-2023-28116 actively exploited?

No active exploitation of CVE-2023-28116 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-28116 be exploited remotely?

Yes. CVE-2023-28116 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-28116?

CVE-2023-28116 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-28116

CWE-120Published: March 17, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Contiki-NG is an open-source, cross-platform operating system for internet of things (IoT) devices. In versions 4.8 and prior, an out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system. The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf. When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf. The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9. The problem can be worked around by applying the patch manually.

NVD Source

Technical Analysis

CVE-2023-28116 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.