CVE-2026-101970 Junos OS and Junos OS Evolved: Specific PIM messages causes rpd crash when multiple-triggered-joins is used
An unauthenticated adjacent attacker can crash the routing daemon by sending specific PIM messages when sparse mode PIM is configured.
- 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-2026-101970?
CVE-2026-101970 is a high-severity use after free 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 Use After Free vulnerability in the rpd PIM Join/Prune processing of Juniper Networks Junos OS and Junos OS Evolved platforms allows an unauthenticated adjacent attacker to crash the routing daemon via specific PIM messages when sparse mode PIM is configured.
Weakness: CWE-416
Which versions are affected by CVE-2026-101970?
How do I fix CVE-2026-101970?
No fix has been published for CVE-2026-101970 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-101970 being exploited?
There is no known exploitation of CVE-2026-101970 in the wild and no public exploit code.
Sources
Also known as GHSA-wg4p-r223-jpr2.