UBUNTU-CVE-2023-4155

    Dashboard / Vulnerabilities / UBUNTU-CVE-2023-4155

    UBUNTU-CVE-2023-4155

    Published: 9 Aug 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-4155
    Aliases:
    USN-6343-1
    USN-6412-1
    USN-6416-1

    Summary:

    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://ubuntu.com/security/CVE-2023-4155, https://git.kernel.org/linus/7588dbcebcbf0193ab5b76987396d0254270b04a, https://patchew.org/linux/[email protected]/, https://ubuntu.com/security/notices/USN-6343-1, https://ubuntu.com/security/notices/USN-6412-1, https://ubuntu.com/security/notices/USN-6416-1, https://ubuntu.com/security/notices/USN-6416-2, https://ubuntu.com/security/notices/USN-6416-3, https://ubuntu.com/security/notices/USN-6445-1, https://ubuntu.com/security/notices/USN-6445-2, https://ubuntu.com/security/notices/USN-6466-1, https://www.cve.org/CVERecord?id=CVE-2023-4155

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2023-4155 | CVE-DB