CVE-2026-1681: Zephyrproject Zephyr

Medium severity, CVSS 6.1. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Zephyrproject Zephyr: up to and including 4.3.0

Published 2026-05-12. Last modified 2026-07-08.