CVE-2026-101994 Junos OS and Junos OS Evolved: Malformed MC-LAG ICCP message causes l2ald heap disclosure or crash
An attacker controlling an MC-LAG peer can send malformed ICCP messages to disclose heap memory or crash the l2ald daemon in 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-2026-101994?
CVE-2026-101994 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 Improper Handling of Length Parameter Inconsistency vulnerability in the
l2ald
daemon of Juniper Networks Junos OS and Junos OS Evolved allows an attacker who can control or impersonate a configured MC-LAG ICCP peer to disclose process heap memory or cause a denial of service via a malformed ICCP message.
Weakness: CWE-130
Which versions are affected by CVE-2026-101994?
How do I fix CVE-2026-101994?
No fix has been published for CVE-2026-101994 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101994 being exploited?
There is no known exploitation of CVE-2026-101994 in the wild and no public exploit code.
Sources
Also known as GHSA-j27m-44x5-5m2c.