VULNERABILITY INTELLIGENCE

CVE-2021-4032

CVSS score4.4 MEDIUM

EPSS probability0.39%

CISA KEVNot currently listed

Published2022-01-21

Last modified2026-06-17

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

Description

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.

Weakness classification

secalert@redhat.com: CWE-459
nvd@nist.gov: CWE-459

Primary references

secalert@redhat.com — Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com — Exploit, Patch, Third Party Advisory
secalert@redhat.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory