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FKIE_CVE-2023-4155

Vulnerability from fkie_nvd - Published: 2023-09-13 17:15 - Updated: 2026-06-17 06:37
Severity
5.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
5.6 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Summary
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
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4155Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2213802Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-4155Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2213802Issue Tracking, Patch, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel -
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
fedoraproject fedora 37
fedoraproject fedora 38
To clipboard 

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