CVE-2026-102051 Junos OS and Junos OS Evolved: An attacker causes l2cpd memory exhaustion when LLDP fast receive processing is enabled
An adjacent attacker can cause memory exhaustion and Layer 2 control-plane disruption in Junos OS via LLDP traffic when fast receive processing 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-2026-102051?
CVE-2026-102051 is a high-severity memory corruption 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 Improper Release of Memory Before Removing Last Reference vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved platforms allows an adjacent unauthenticated attacker to cause l2cpd memory exhaustion and Layer 2 control-plane disruption via LLDP traffic when fast receive processing is enabled.
Weakness: CWE-401
Which versions are affected by CVE-2026-102051?
How do I fix CVE-2026-102051?
No fix has been published for CVE-2026-102051 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-102051 being exploited?
There is no known exploitation of CVE-2026-102051 in the wild and no public exploit code.
Sources
Also known as GHSA-852v-q4p2-pprc.