VULNERABILITY INTELLIGENCE

CVE-2021-4083

CVSS score7 HIGH
EPSS probability0.31%
CISA KEVNot currently listed
Published2022-01-18
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.

Weakness classification

  • secalert@redhat.com: CWE-416
  • nvd@nist.gov: CWE-362

Primary references