What is CVE-2026-10849?

CVE-2026-10849 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-08-03.

How severe is CVE-2026-10849?

High severity. CVSS v3 base score is 8.2 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2026-10849

The hawkBit device management client in subsys/mgmt/hawkbit accumulates the body of an HTTP response from the update server into a heap buffer in response_json_cb() (subsys/mgmt/hawkbit/hawkbit.c). The buffer is sized to hold the received…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Zephyrproject Zephyr — versions 2.4.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow
CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-10849?: CVE-2026-10849 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-08-03.
How severe is CVE-2026-10849?: High severity. CVSS v3 base score is 8.2 out of 10.