CVE-2021-4093

Summary

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.

Affected Software

VendorProductVersion RangeStatus
n/akernelkernel 5.15affected

Weaknesses

  • CWE-125: (CWE-125|CWE-787)

ADP Enrichment

CVE Program Container

Additional References

References