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.

Score
CVSS 3.1 8.8 High
Status
Modified - secalert@redhat.com
Published
2022-02-18
Last modified
2024-08-03
Weaknesses
CWE-125, CWE-787

Affected products

References

 
 
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