CVE-2026-101972 Junos OS and Junos OS Evolved: Malformed OSPF packets causes routing disruption when OSPF is enabled
An unauthenticated adjacent attacker can cause denial of service in Juniper Junos OS by sending malformed OSPF packets when OSPF is enabled.
- 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-2026-101972?
CVE-2026-101972 is a high-severity 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
An Integer Overflow or Wraparound vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a denial of service via specific OSPFv2 packets sent on an OSPF-enabled interface.
Weakness: CWE-190
Which versions are affected by CVE-2026-101972?
How do I fix CVE-2026-101972?
No fix has been published for CVE-2026-101972 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101972 being exploited?
There is no known exploitation of CVE-2026-101972 in the wild and no public exploit code.
Sources
Also known as GHSA-qjp2-x6fg-g376.