CVE-2021-4150

Name: CVE-2021-4150
Creator: NVD / NIST
Published: 2022-03-23T20:15:10.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2021-4150 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel. A local attacker with user privileges could cause a denial of service on the system. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel. A local attacker with user privileges could cause a denial of service on the system. The issue results from the lack of code cleanup when device_add call fails when adding a partition to the disk.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.34%

25.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.15
Linux	Linux Kernel	5.15

References

https://bugzilla.redhat.com/show_bug.cgi?id=2025938Issue Tracking, Third Party Advisory
https://lkml.org/lkml/2021/10/18/485Exploit, Third Party Advisory
https://lkml.org/lkml/2021/9/6/781Exploit, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2025938Issue Tracking, Third Party Advisory
https://lkml.org/lkml/2021/10/18/485Exploit, Third Party Advisory
https://lkml.org/lkml/2021/9/6/781Exploit, Third Party Advisory

Timeline

Published: Mar 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4150?

How severe is CVE-2021-4150?

CVE-2021-4150 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4150?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4150?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST