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    Dashboard / CVE / CVE-2023-6816

    CVE-2023-6816

    A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

    Published:Jan 16, 2024
    Last Modified:Mar 19, 2026
    EPS:Jan 18, 2024
    EPSS Score:0.03264
    CVSS Score:9.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Els
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    X.org
    Product
    X Server
    Vendor
    X.org
    Product
    Xwayland

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://access.redhat.com/errata/RHSA-2024:0320
    https://access.redhat.com/errata/RHSA-2024:0557
    https://access.redhat.com/errata/RHSA-2024:0558
    https://access.redhat.com/errata/RHSA-2024:0597
    https://access.redhat.com/errata/RHSA-2024:0607
    https://access.redhat.com/errata/RHSA-2024:0614
    https://access.redhat.com/errata/RHSA-2024:0617
    https://access.redhat.com/errata/RHSA-2024:0621
    https://access.redhat.com/errata/RHSA-2024:0626
    https://access.redhat.com/errata/RHSA-2024:0629
    https://access.redhat.com/errata/RHSA-2024:2169
    https://access.redhat.com/errata/RHSA-2024:2170
    https://access.redhat.com/errata/RHSA-2024:2995
    https://access.redhat.com/errata/RHSA-2024:2996
    https://access.redhat.com/errata/RHSA-2025:12751
    https://access.redhat.com/security/cve/CVE-2023-6816
    https://bugzilla.redhat.com/show_bug.cgi?id=2257691
    http://www.openwall.com/lists/oss-security/2024/01/18/1
    https://access.redhat.com/errata/RHSA-2024:0320
    https://access.redhat.com/errata/RHSA-2024:0557
    https://access.redhat.com/errata/RHSA-2024:0558
    https://access.redhat.com/errata/RHSA-2024:0597
    https://access.redhat.com/errata/RHSA-2024:0607
    https://access.redhat.com/errata/RHSA-2024:0614
    https://access.redhat.com/errata/RHSA-2024:0617
    https://access.redhat.com/errata/RHSA-2024:0621
    https://access.redhat.com/errata/RHSA-2024:0626
    https://access.redhat.com/errata/RHSA-2024:0629
    https://access.redhat.com/errata/RHSA-2024:2169
    https://access.redhat.com/errata/RHSA-2024:2170
    https://access.redhat.com/errata/RHSA-2024:2996
    https://access.redhat.com/security/cve/CVE-2023-6816
    https://bugzilla.redhat.com/show_bug.cgi?id=2257691
    https://lists.debian.org/debian-lts-announce/2024/01/msg00016.html
    https://lists.fedoraproject.org/archives/list/[email protected]/message/5J4H7CH565ALSZZYKOJFYDA5KFLG6NUK/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/EJBMCWQ54R6ZL3MYU2D2JBW6JMZL7BQW/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/IZ75X54CN4IFYMIV7OK3JVZ57FHQIGIC/
    https://security.gentoo.org/glsa/202401-30
    https://security.netapp.com/advisory/ntap-20240307-0006/

    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