What is CVE-2021-3323?

CVE-2021-3323 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Integer Underflow. CVSS score: 8.3/10. Published 2021-10-12.

How severe is CVE-2021-3323?

High severity. CVSS v3 base score is 8.3 out of 10.

Integer overflow in Zephyrproject Zephyr

CVE-2021-3323

Integer Underflow in 6LoWPAN IPHC Header Uncompression in Zephyr. Zephyr versions >= >=2.4.0 contain Integer Underflow (Wrap or Wraparound) (CWE-191). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisori…

EPSS: 0.009 (55.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.

Affected products

Zephyrproject Zephyr
Zephyrproject-rtos Zephyr — versions >=2.4.0

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

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

Frequently asked questions

What is CVE-2021-3323?: CVE-2021-3323 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Integer Underflow. CVSS score: 8.3/10. Published 2021-10-12.
How severe is CVE-2021-3323?: High severity. CVSS v3 base score is 8.3 out of 10.