CVE-2026-101989 Junos OS and Junos OS Evolved: An crafted LDP message causes an rpd crash when LDP is enabled
A compromised LDP neighbor can crash the routing protocol daemon in Junos OS by sending a crafted LDP message, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101989?
CVE-2026-101989 is a high-severity denial of service vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a compromised LDP neighbor to cause an rpd crash via a crafted LDP message.
Weakness: CWE-617
Which versions are affected by CVE-2026-101989?
How do I fix CVE-2026-101989?
No fix has been published for CVE-2026-101989 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-2026-101989 being exploited?
There is no known exploitation of CVE-2026-101989 in the wild and no public exploit code.
Sources
Also known as GHSA-6h4g-6qmf-9pj4.