PatchTheCVECVE-2024-42861: An issue in IEEE 802.1AS linuxptp v.4.2 and before allowing a remote attacker to cause a denial of service via
CVE-2024-42861 is a high-severity flaw (CVSS 7.5) affecting linuxptp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.6% (top 25%) |
| CISA exploited list | No |
| Published | 2024-09-23 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-42861?
linuxptp: upgrade to newer than 4.2. Exact commands for each OS are on this page.
Is CVE-2024-42861 being exploited?
CVE-2024-42861 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-42861 affect?
CVE-2024-42861 affects linuxptp. Severity is high (CVSS 7.5). 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
How urgent is CVE-2024-42861?
Priority 55/100. High severity; Remotely exploitable, no login, no user action; On your watchlist