CVE-2026-101968 Integer overflow in Junos OS
An unauthenticated adjacent attacker can cause heap memory disclosure and multicast join-state injection via malformed Rosen-MVPN messages on specific Juniper platforms.
- 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-2026-101968?
CVE-2026-101968 is a medium-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 Underflow (Wrap or Wraparound) vulnerability in the rpd process of Juniper Networks Junos OS on EX Series and MX Series, and Junos OS Evolved on ACX Series allows an unauthenticated adjacent attacker to cause heap memory disclosure and multicast join-state injection via a malformed Rosen-MVPN message.
This issue only affects platforms that support draft Rosen MVPN, such as the ACX Series, EX Series, and MX Series.
Weakness: CWE-191
Which versions are affected by CVE-2026-101968?
How do I fix CVE-2026-101968?
No fix has been published for CVE-2026-101968 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101968 being exploited?
There is no known exploitation of CVE-2026-101968 in the wild and no public exploit code.
Sources
Also known as GHSA-7prh-2254-fh5w.