CVE-2021-4083

high

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.

References

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

https://www.oracle.com/security-alerts/cpujul2022.html

Details

Source: MITRE

Published: 2022-01-18

Updated: 2022-07-25

Type: CWE-416

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7

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

Impact Score: 5.9

Exploitability Score: 1

Severity: HIGH