Vulnerability Database

319,478

Total vulnerabilities in the database

CVE-2021-31870

An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.

  • Published: Apr 30, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-31870
  • Severity: Critical
  • Exploit:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

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

CWEs:

Software From Fixed in
klibc_project / klibc - 2.0.9
debian / debian_linux 9.0 9.0.x