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.
References
Link | Resource |
---|---|
https://bugs.chromium.org/p/project-zero/issues/detail?id=2222 | Exploit Mailing List Patch Third Party Advisory |
https://bugzilla.redhat.com/show_bug.cgi?id=2028584 | Issue Tracking Patch Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: redhat
Published: 2022-02-18T17:50:37
Updated: 2022-02-18T17:50:37
Reserved: 2021-12-10T00:00:00
Link: CVE-2021-4093
JSON object: View
NVD Information
Status : Modified
Published: 2022-02-18T18:15:10.363
Modified: 2023-11-07T03:40:10.397
Link: CVE-2021-4093
JSON object: View
Redhat Information
No data.