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CVE-2021-4083

Public on 2022-01-18
Modified on 2022-02-04
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.

Severity
Important
See what this means
CVSS v3 Base Score
7.4
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core kernel 2022-02-04 23:25 ALAS2-2022-1749

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C

References

Red Hat: CVE-2021-4083 Mitre: CVE-2021-4083 FAQs regarding Amazon Linux ALAS/CVE Severity