Vulnerability Database

314,433

Total vulnerabilities in the database

CVE-2021-20321

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

  • Published: Feb 18, 2022
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-20321
  • Severity: Low
  • Exploit:

CVSS v3:

  • Severity: Low
  • Score: 4.7
  • AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 4.7
  • AV:L/AC:M/Au:N/C:N/I:N/A:C

CWEs:

Software From Fixed in
linux / linux_kernel 5.15-rc2 5.15-rc2.x
linux / linux_kernel 5.15-rc3 5.15-rc3.x
linux / linux_kernel 5.15 5.15.x
linux / linux_kernel 5.15-rc1 5.15-rc1.x
linux / linux_kernel 5.15-rc4 5.15-rc4.x
linux / linux_kernel - 5.15
redhat / enterprise_linux 7.0 7.0.x
redhat / enterprise_linux 8.0 8.0.x
debian / debian_linux 9.0 9.0.x
debian / debian_linux 10.0 10.0.x