What is CVE-2021-4032?

CVE-2021-4032 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10. CVE-2021-4032 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-4032?

CVE-2021-4032 has a CVSS score of 4.4 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-4032?

No patch is currently available for CVE-2021-4032. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-4032 actively exploited?

CVE-2021-4032 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-4032

Medium

A vulnerability was found in the Linux kernel's KVM subsystem in arch/x86/kvm/lapic.c kvm_free_lapic when a failure allocation was detected. In this flaw the KVM subsystem may crash the kernel due to mishandling of memory errors that happens during VCPU construction, which allows an attacker with special user privilege to cause a denial of service. This flaw affects kernel versions prior to 5.15 rc7.

Package Linux Kernel

Published 2022-01-21

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

4.4

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-459

CVE-2021-4032 is classified as CWE-459

See CWE-459 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-4032 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Lkml
https://lkml.org/lkml/2021/9/8/587

Exploit Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=2027403
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f7d8a19f9a056a05c5c509fa65af472a322abfee
Patch

Details

CVE ID CVE-2021-4032

Severity Medium

CVSS score 4.4 / 10

CVSS version 3.1

Published 2022-01-21

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-4032?

CVE-2021-4032 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10 . CVE-2021-4032 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-4032?

CVE-2021-4032 has a CVSS score of 4.4 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-4032?

No patch is currently available for CVE-2021-4032. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-4032 actively exploited?

No — CVE-2021-4032 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.