What is CVE-2021-3434?

CVE-2021-3434 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Stack-based Buffer Overflow. CVSS score: 4.9/10. Published 2022-06-28.

How severe is CVE-2021-3434?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2021-3434

Stack based buffer overflow in le_ecred_conn_req(). Zephyr versions >= v2.5.0 Stack-based Buffer Overflow (CWE-121). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrm

Vulnerability class: Buffer Overflow

EPSS: 0.002 (10.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Zephyrproject Zephyr
Zephyrproject-rtos Zephyr — versions v2.5.0, v2.6.0

Weakness classification (CWE)

References

vulnerabilities@zephyrproject.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-3434?: CVE-2021-3434 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Stack-based Buffer Overflow. CVSS score: 4.9/10. Published 2022-06-28.
How severe is CVE-2021-3434?: Medium severity. CVSS v3 base score is 4.9 out of 10.