CVE-2023-4155

Sev-es / sev-snp vmgexit double fetch vulnerability

Published Sep 13, 2023 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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`).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-5492-1 linux security update
EUVD EUVD EUVD-2023-54035 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`).
Ubuntu USN Ubuntu USN USN-6343-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6412-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-3 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-6445-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6445-2 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6466-1 Linux kernel (NVIDIA) vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Feb 27, 2025, 8:52 PM
Reserved
Aug 4, 2023, 2:48 PM
Status
Modified
Published
Sep 13, 2023, 5:15 PM
Modified
Jun 17, 2026, 6:37 AM
Severity
Moderate
Public date
Aug 4, 2023, 12:00 AM