CVE-2021-4083 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9 https://bugzilla.redhat.com/show_bug.cgi?id=2029923 https://security.netapp.com/advisory/ntap-20220217-0005/ https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html https://www.debian.org/security/2022/dsa-5096

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.0