CVE-2026-102042 Junos OS and Junos OS Evolved: An attacker causes rpd to crash when RSVP associated-bidirectional LSP is enabled
An adjacent attacker can crash the routing process in Juniper Junos OS by exploiting a reachable assertion in RSVP-TE signaling.
- 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-2026-102042?
CVE-2026-102042 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 rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker to crash the routing process via RSVP-TE associated-bidirectional LSP signaling.
Weakness: CWE-617
Which versions are affected by CVE-2026-102042?
How do I fix CVE-2026-102042?
No fix has been published for CVE-2026-102042 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-2026-102042 being exploited?
There is no known exploitation of CVE-2026-102042 in the wild and no public exploit code.
Sources
Also known as GHSA-7mv8-894j-8w59.