What is CVE-2026-11809?

CVE-2026-11809 is a low-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-08-10.

How severe is CVE-2026-11809?

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

Out-of-bounds Read in Zephyrproject Zephyr

CVE-2026-11809

The UpdateHub OTA client in subsys/mgmt/updatehub/updatehub.c contains an out-of-bounds / uninitialized-memory read in z_impl_updatehub_probe(). The probe response from the UpdateHub server is copied into a heap buffer (metadata) that is c…

Vulnerability class: Buffer Overflow

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-125 — Out-of-bounds Read
CWE-908 — Use of Uninitialized Resource

References

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

Frequently asked questions

What is CVE-2026-11809?: CVE-2026-11809 is a low-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-08-10.
How severe is CVE-2026-11809?: Low severity. CVSS v3 base score is 3.7 out of 10.