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CVE-2021-4083 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7 HIGHVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=2029923 CVEIssue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9 CVEMailing ListPatch
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html CVEMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html CVEMailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0005/ CVEThird Party Advisory

see all 14 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')[email protected]
CWE-416Use After Free[email protected]

Affected Products

ProductVersions

Change History

12 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-4083
NVD Published Date:
Jan 18, 2022
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-4083 Details - Not Deferred