VULNERABILITY INTELLIGENCE

CVE-2021-20321

CVSS score4.7 MEDIUM
EPSS probability0.22%
CISA KEVNot currently listed
Published2022-02-18
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

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.

Weakness classification

  • secalert@redhat.com: CWE-362
  • nvd@nist.gov: CWE-362

Primary references