What is CVE-2026-10686?

CVE-2026-10686 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.8/10. Published 2026-07-31.

How severe is CVE-2026-10686?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Zephyrproject Zephyr

CVE-2026-10686

Zephyr's IPv6 forwarding path re-sent routed unicast packets without ever decrementing the IPv6 hop limit. Both routing branches of ipv6_route_packet() (subsys/net/ip) were affected: the explicit-route path (net_route_packet()) and the on-…

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.

Affected products

Zephyrproject Zephyr — versions 1.8.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

vulnerabilities@zephyrproject.org (patch)
vulnerabilities@zephyrproject.org

Frequently asked questions

What is CVE-2026-10686?: CVE-2026-10686 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.8/10. Published 2026-07-31.
How severe is CVE-2026-10686?: Medium severity. CVSS v3 base score is 5.8 out of 10.