Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-4093

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.2%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 7.2
Products affected by CVE-2021-4093


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