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CVE-2021-4083

Date: January 18, 2022

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.

Severity Score

Related Resources (12)

https://nvd.nist.gov/vuln/detail/CVE-2021-4083
https://security.netapp.com/advisory/ntap-20220217-0005/
https://security-tracker.debian.org/tracker/CVE-2021-4083
https://access.redhat.com/security/cve/CVE-2021-4083
https://bugzilla.redhat.com/show_bug.cgi?id=2029923
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-4083
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
https://www.debian.org/security/2022/dsa-5096
https://www.oracle.com/security-alerts/cpujul2022.html
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
https://www.mend.io/vulnerability-database/CVE-2021-4083

Severity Score

Weakness Type (CWE)

Race Conditions

CWE-362

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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