What is CVE-2026-11811?

CVE-2026-11811 is a low-severity vulnerability in Zephyrproject Zephyr, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 3.7/10. Published 2026-08-10.

How severe is CVE-2026-11811?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Zephyrproject Zephyr

CVE-2026-11811

The UpdateHub over-the-air update client's start_coap_client() in subsys/mgmt/updatehub/updatehub.c leaks the CoAP/DTLS socket descriptor on its connection-setup failure paths. The shared error: cleanup gated socket closing on a ret > 0 fl…

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Zephyrproject Zephyr — versions 2.0.0

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

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

Frequently asked questions

What is CVE-2026-11811?: CVE-2026-11811 is a low-severity vulnerability in Zephyrproject Zephyr, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 3.7/10. Published 2026-08-10.
How severe is CVE-2026-11811?: Low severity. CVSS v3 base score is 3.7 out of 10.