CVE-2026-101938 Junos OS and Junos OS Evolved: SRX Series: An attacker causes a forwarding-plane outage when SVR vector routing is used
An adjacent attacker can cause a forwarding-plane denial of service on Juniper SRX devices by exploiting an integer underflow in SVR vector routing.
- 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-2026-101938?
CVE-2026-101938 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 Integer Underflow (Wrap or Wraparound) vulnerability in the srxpfe of Juniper Networks Junos OS and Junos OS Evolved on the SRX Series allows an adjacent unauthenticated attacker to cause a forwarding-plane denial of service via an ICMP message associated with an SVR carrier session.
Weakness: CWE-191
Which versions are affected by CVE-2026-101938?
How do I fix CVE-2026-101938?
No fix has been published for CVE-2026-101938 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101938 being exploited?
There is no known exploitation of CVE-2026-101938 in the wild and no public exploit code.
Sources
Also known as GHSA-m422-p9p5-2983.