What is CVE-2021-3431?

CVE-2021-3431 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Reachable Assertion. CVSS score: 4.3/10. Published 2022-06-28.

How severe is CVE-2021-3431?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2021-3431 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Zephyrproject Zephyr

CVE-2021-3431

Assertion reachable with repeated LL_FEATURE_REQ. Zephyr versions >= v2.5.0 contain Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7548-5m6f-mqv9

EPSS: 0.009 (54.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Zephyrproject Zephyr
Zephyrproject-rtos Zephyr — versions v2.5.0

Weakness classification (CWE)

CWE-617 — Reachable Assertion

Public proof-of-concept exploits

asset-group/vakt-ble-defender

References

vulnerabilities@zephyrproject.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-3431?: CVE-2021-3431 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Reachable Assertion. CVSS score: 4.3/10. Published 2022-06-28.
How severe is CVE-2021-3431?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2021-3431 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.