AZL-6554

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AZL-6554

Summary: CVE-2021-29657 affecting package kernel for versions less than 5.10.78.1-1

Details: 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.

References: https://nvd.nist.gov/vuln/detail/CVE-2021-29657