CVE-2021-4093 | BDVDB-2026-170258 Detail

Description#

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.

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History#

1. Version 12022-02-18Record published in the CVE List.
2. Version 22024-08-03Most recent update recorded in the CVE List.