CVE-2021-4093

2022-02-1817:50:37

CWE-125

redhat

www.cve.org

8.6 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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.

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "kernel 5.15"
      }
    ]
  }
]