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| CVE ID: | CVE-2023-4155 |
| Description: | A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`). |
| Test IDs: | 1.3.6.1.4.1.25623.1.1.10.2023.0295 1.3.6.1.4.1.25623.1.1.10.2023.0296 |
| Cross References: |
Common Vulnerability Exposure (CVE) ID: CVE-2023-4155 RHBZ#2213802 https://bugzilla.redhat.com/show_bug.cgi?id=2213802 https://access.redhat.com/security/cve/CVE-2023-4155 https://access.redhat.com/security/cve/CVE-2023-4155 |