CVE-2024-42861

HIGH

linuxptp < 4.2 - Denial of Service via Crafted Pdelay_Req Message

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-42861. PoCs published by qiupy123.

AI-analyzed exploit summary The repository describes a DoS vulnerability in the IEEE 802.1AS standard (gPTP protocol) where sending two Pdelay_Req messages with different ClockIDs disables time synchronization on the target port. The attack was reproduced on linuxPTP, a software implementation of PTP and gPTP protocols.

Description

An issue in IEEE 802.1AS linuxptp v.4.2 and before allowing a remote attacker to cause a denial of service via a crafted Pdelay_Req message to the time synchronization function

Exploits (1)

nomisec WRITEUP
by qiupy123 · poc
https://github.com/qiupy123/CVE-2024-42861

The repository describes a DoS vulnerability in the IEEE 802.1AS standard (gPTP protocol) where sending two Pdelay_Req messages with different ClockIDs disables time synchronization on the target port. The attack was reproduced on linuxPTP, a software implementation of PTP and gPTP protocols.

Classification
Writeup 80%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: IEEE 802.1AS standard (gPTP protocol), linuxPTP
No auth needed
Prerequisites: Attacker and target must be on the same Ethernet network · Target device must have IEEE 802.1AS enabled
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0149
EPSS Percentile 70.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

Status published
Products (1)
linuxptp_project/linuxptp < 4.2
Published Sep 23, 2024
Tracked Since Feb 18, 2026