CVE-2020-36313

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 5.7

Description: The issue is caused by a buffer overflow in the Kernel-based Virtual Machine (KVM) subsystem of the Linux kernel, specifically affecting components arch/s390/kvm/kvm-s390.c, include/linux/kvm host.h, and virt/kvm/kvm main.c. This allows an attacker to impact the confidentiality, integrity, and availability of protected information. The KVM subsystem permits out-of-range access to memslots after a deletion.

Recommendations: For versions prior to 5.7, update to version 5.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the KVM subsystem until a patch is available.