Medium severity4.4NVD Advisory· Published Jan 21, 2022· Updated Jun 17, 2026
CVE-2021-4032
CVE-2021-4032
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.
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Affected products
2Patches
Vulnerability mechanics
References
3- bugzilla.redhat.com/show_bug.cginvdIssue TrackingPatchThird Party Advisory
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/nvdExploitPatchThird Party Advisory
- lkml.org/lkml/2021/9/8/587nvdExploitThird Party Advisory
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