CVE-2025-30659 Junos OS: SRX Series: A device configured for vector routing crashes when receiving malformed traffic

High 8.7 Published 9 Apr 2025 Updated 9 Apr 2025

An unauthenticated attacker can crash the Packet Forwarding Engine on Juniper SRX devices configured for Secure Vector Routing by sending malformed packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-30659?

CVE-2025-30659 is a high-severity denial of service vulnerability in Juniper Junos, published on 9 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Improper Handling of Length Parameter Inconsistency vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

When a device configured for Secure Vector Routing (SVR) receives a specifically malformed packet the PFE will crash and restart. This issue affects Junos OS on SRX Series:

* All 21.4 versions, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R2.

This issue does not affect versions before 21.4.

Weakness: CWE-130

Which versions are affected by CVE-2025-30659?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2025-30659?

No fix has been published for CVE-2025-30659 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-30659 being exploited?

There is no known exploitation of CVE-2025-30659 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-g6r3-vqhr-8438.