UBUNTU-CVE-2023-2640

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    UBUNTU-CVE-2023-2640

    Published: 6 Jun 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-2640
    Aliases:
    USN-6248-1
    USN-6250-1
    USN-6260-1

    Summary:

    Details: On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

    References: https://ubuntu.com/security/CVE-2023-2640, https://wiz.io/blog/ubuntu-overlayfs-vulnerability, https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html, https://ubuntu.com/security/notices/USN-6248-1, https://ubuntu.com/security/notices/USN-6250-1, https://ubuntu.com/security/notices/USN-6260-1, https://ubuntu.com/security/notices/USN-6285-1, https://www.cve.org/CVERecord?id=CVE-2023-2640, https://ubuntu.com/security/notices/USN-8255-1, https://ubuntu.com/security/notices/USN-8255-2, https://ubuntu.com/security/notices/USN-8255-3, https://ubuntu.com/security/notices/USN-8275-1, https://ubuntu.com/security/notices/USN-8297-1, https://ubuntu.com/security/notices/USN-8439-1

    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-2023-2640 | CVE-DB