A flaw was found in the KVM’s AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.
CPE | Name | Operator | Version |
---|---|---|---|
ubuntu_linux | eq | 20.04 | |
ubuntu_linux | eq | 21.10 | |
fedora | eq | 35 | |
linux_kernel | ge | 5.11 | |
linux_kernel | lt | 5.14.16 | |
enterprise_linux | eq | 8.0 |