CVE-2026-102048 Junos OS: An attacker causes l2cpd crash when FNP is used with VLAN-VPLS encapsulation enabled
An adjacent attacker can crash the l2cpd process causing denial of service when FNP is enabled with VLAN-VPLS encapsulation on Junos OS.
- 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-2026-102048?
CVE-2026-102048 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
An Allocation of Resources Without Limits or Throttling vulnerability in the l2cpd process of Juniper Networks Junos OS allows an adjacent unauthenticated attacker to cause a denial of service and l2cpd restart via FNP-enabled Layer 2 interfaces. The issue is triggered when the FNP feature is enabled on a VPLS routing instance with VLAN-VPLS encapsulation enabled.
This issue affects all platforms except the PTX Series and SRX Series.
Weakness: CWE-770
Which versions are affected by CVE-2026-102048?
How do I fix CVE-2026-102048?
No fix has been published for CVE-2026-102048 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-2026-102048 being exploited?
There is no known exploitation of CVE-2026-102048 in the wild and no public exploit code.
Sources
Also known as GHSA-cfqf-pw39-4rx2.