CVE-2026-1681 zephyrproject-rtos CVE debrief

Who should care

Organizations using the Zephyr Project network stack should be aware of this vulnerability and take steps to defend against it. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Technical summary

The vulnerability occurs when an ICMP ping is issued via the `net ping` shell command to a device's own IPv4 address. The network stack recursively re-enters the input path on the same system work-queue stack, exceeding the work-queue stack and triggering a stack overflow. This can lead to a denial of service or potentially allow an attacker to execute arbitrary code. The affected product is the Zephyr Project network stack.

Defensive priority

Medium

Recommended defensive actions

• Apply the patch or update to a fixed version of the Zephyr Project
• Restrict access to the `net ping` shell command
• Monitor for suspicious activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-05-12T07:16:09.843Z and last modified on 2026-07-08T13:34:13.990Z. The NVD entry is currently Analyzed. This information is based on the provided source corpus and may not reflect the full scope of the vulnerability. Further verification is recommended to ensure accurate understanding of the vulnerability's impact.

Official resources