Vulnerability Database

318,388

Total vulnerabilities in the database

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/advisories/GHSA-89j6-qpxf-pfpc

  • Published: Oct 12, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-3323
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.3
  • AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
zephyrproject / zephyr 2.4.0 2.5.0