What is CVE-2021-3835?

CVE-2021-3835 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2022-02-07.

How severe is CVE-2021-3835?

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

Is CVE-2021-3835 known to be exploited?

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

Buffer overflow in Zephyrproject Zephyr

CVE-2021-3835

Buffer overflow in usb device class. Zephyr versions >= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fm6v-8625-99jf

Vulnerability class: Buffer Overflow

EPSS: 0.007 (51.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Zephyrproject Zephyr — versions 3.0.0
Zephyrproject-rtos Zephyr — versions v2.6.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

vulnerabilities@zephyrproject.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3835?: CVE-2021-3835 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2022-02-07.
How severe is CVE-2021-3835?: High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2021-3835 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.