CVE-2021-29657 – arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which …

Vuln ID: CVE-2021-29657

Published:  2021-07-22  17:15:09Z

Description: arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in nested_svm_vmrun.

Source: NVD.NIST.GOV