What is CVE-2026-10634?

CVE-2026-10634 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Use After Free. CVSS score: 4.8/10. Published 2026-06-15.

How severe is CVE-2026-10634?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Use After Free in Zephyrproject Zephyr

CVE-2026-10634

Zephyr's native TCP stack iterates the global connection list in net_tcp_foreach() (subsys/net/ip/tcp.c) using the SYS_SLIST_FOR_EACH_CONTAINER_SAFE macro, which caches a pointer to the next list node. Prior to this fix the function releas…

Vulnerability class: Use-After-Free

EPSS: 0.003 (19.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Zephyrproject Zephyr — versions 2.5.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2026-10634?: CVE-2026-10634 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Use After Free. CVSS score: 4.8/10. Published 2026-06-15.
How severe is CVE-2026-10634?: Medium severity. CVSS v3 base score is 4.8 out of 10.