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CVE-2023-4155

Published

Last updated

NVD

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

CGA ID

CGA-m66g-9w55-m9gp

Severity

Unknown

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).

References

  • https://images.chainguard.dev/security/CGA-m66g-9w55-m9gp

Affected packages


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