CVE-2026-1681 net: Stack Overflow with Ping (to own IP Address) via Shell

Medium 6.1 Published 12 May 2026 Updated 15 Oct 2026

An attacker can cause a stack overflow and denial of service by pinging the device's own IP address via the shell.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-1681?

CVE-2026-1681 is a medium-severity denial of service vulnerability in Zephyrproject Zephyr, published on 12 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Issuing an ICMP ping via the `net ping` shell command to a device's own IPv4 address causes the network stack to recursively re-enter the input path on the same system work-queue stack. Because the destination is recognized as a local address, both the echo request and the resulting echo reply are processed inline before the current frame returns. The nested input-path frames exceed the work-queue stack and trigger a stack overflow.

Weakness: CWE-787, CWE-674

Which versions are affected by CVE-2026-1681?

It affects 1 product.

Products include Zephyrproject Zephyr.

How do I fix CVE-2026-1681?

No fix has been published for CVE-2026-1681 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-2026-1681 being exploited?

There is no known exploitation of CVE-2026-1681 in the wild and no public exploit code.

All Zephyrproject Zephyr vulnerabilities

Sources

Also known as GHSA-6fcc-8rwr-w7xx.