AZL-29700

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AZL-29700

Summary: CVE-2023-4155 affecting package hyperv-daemons for versions less than 5.15.158.1-1

Details: 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`).

References: https://nvd.nist.gov/vuln/detail/CVE-2023-4155