What is CVE-2026-10637?

CVE-2026-10637 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Use After Free. CVSS score: 5.9/10. Published 2026-06-16.

How severe is CVE-2026-10637?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Use After Free in Zephyrproject Zephyr

CVE-2026-10637

subsys/net/ip/ipv6_mld.c:mld_send() read the packet interface via net_pkt_iface(pkt) after net_send_data(pkt) returned successfully. Per the network stack's ownership contract (include/zephyr/net/net_core.h, and the explicit warning in sub…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Zephyrproject Zephyr — versions 1.12.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2026-10637?: CVE-2026-10637 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Use After Free. CVSS score: 5.9/10. Published 2026-06-16.
How severe is CVE-2026-10637?: Medium severity. CVSS v3 base score is 5.9 out of 10.