CVE-2023-24825Network attack vector

Service interruption via truncated 6LoWPAN IPHC header

Published May 30, 2023 · Updated Jan 10, 2025

NULL pointer dereference in RIOT-OS RIOT before 2023.04 allows remote attackers to interrupt device service via crafted 6LoWPAN frames. When gnrc_pktbuf_mark marks an aligned whole packet snippet, it sets pkt->data to NULL but leaves the snippet in the packet chain, so IPHC decoding dereferences it. A network path capable of delivering 6LoWPAN fragments to the GNRC stack is required, and exploitation interrupts only the affected device service.

CVSS severity7.5
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in RIOT-OS RIOT before 2023.04 allows remote attackers to interrupt device service via crafted 6LoWPAN frames. When gnrc_pktbuf_mark marks an aligned whole packet snippet, it sets pkt->data to NULL but leaves the snippet in the packet chain, so IPHC decoding dereferences it. A network path capable of delivering 6LoWPAN fragments to the GNRC stack is required, and exploitation interrupts only the affected device service.

The record

CVE
CVE-2023-24825
Published
May 30, 2023
Updated
Jan 10, 2025
Vendor
RIOT-OS
Product
RIOT
Classifications
CWE-252, CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2023.04

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RIOT-OS · RIOTversion=< 2023.04

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-252Unchecked Return Value
CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo