CVE-2021-4093
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-4093
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-4093.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-4093
- Downstream
- Related
- Published
- 2022-02-18T18:15:10Z
- Modified
- 2025-08-09T20:01:27Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 SVMEXITIOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.
- References