CVE-2026-101996 Junos OS and Junos OS Evolved: An inconsistent ICCP peer message causes an l2ald crash when MC-LAG is configured
An adjacent attacker can crash the l2ald daemon on Juniper devices configured for MC-LAG by sending inconsistent ICCP peer messages.
- 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-2026-101996?
CVE-2026-101996 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
l2ald
daemon of Juniper Networks Junos OS and Junos OS Evolved devices configured for MC-LAG/ICCP allows an adjacent attacker to cause a denial of service via an inconsistent ICCP peer message.
Weakness: CWE-617
Which versions are affected by CVE-2026-101996?
How do I fix CVE-2026-101996?
No fix has been published for CVE-2026-101996 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-2026-101996 being exploited?
There is no known exploitation of CVE-2026-101996 in the wild and no public exploit code.
Sources
Also known as GHSA-cvcv-ghr7-j8gj.