What is CVE-2026-1681?

CVE-2026-1681 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Uncontrolled Recursion. CVSS score: 6.1/10. Published 2026-05-12.

How severe is CVE-2026-1681?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2026-1681

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 addr…

EPSS: 0.001 (4.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.

Affected products

Zephyrproject Zephyr
Zephyrproject-rtos Zephyr

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion
CWE-787 — Out-of-bounds Write

References

vulnerabilities@zephyrproject.org (Exploit, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-1681?: CVE-2026-1681 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Uncontrolled Recursion. CVSS score: 6.1/10. Published 2026-05-12.
How severe is CVE-2026-1681?: Medium severity. CVSS v3 base score is 6.1 out of 10.