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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: redhat
Published: 2022-02-18T17:50:37
Updated: 2024-08-03T17:16:03.525Z
Reserved: 2021-12-10T00:00:00
Link: CVE-2021-4093
Vulnrichment
No data.
NVD
Status : Modified
Published: 2022-02-18T18:15:10.363
Modified: 2024-11-21T06:36:53.303
Link: CVE-2021-4093
Redhat