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    CVE-2023-6377

    A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved.

    Published:Dec 13, 2023
    Last Modified:Jun 23, 2026
    EPS:Dec 13, 2023
    EPSS Score:0.01587
    CVSS Score:7.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    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
    Tigervnc
    Product
    Tigervnc
    Vendor
    X.org
    Product
    X Server
    Vendor
    X.org
    Product
    Xwayland

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    https://access.redhat.com/errata/RHSA-2023:7886
    https://access.redhat.com/errata/RHSA-2024:0006
    https://access.redhat.com/errata/RHSA-2024:0009
    https://access.redhat.com/errata/RHSA-2024:0010
    https://access.redhat.com/errata/RHSA-2024:0014
    https://access.redhat.com/errata/RHSA-2024:0015
    https://access.redhat.com/errata/RHSA-2024:0016
    https://access.redhat.com/errata/RHSA-2024:0017
    https://access.redhat.com/errata/RHSA-2024:0018
    https://access.redhat.com/errata/RHSA-2024:0020
    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-2025:13998
    https://access.redhat.com/security/cve/CVE-2023-6377
    https://bugzilla.redhat.com/show_bug.cgi?id=2253291
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/0c1a93d319558fe3ab2d94f51d174b4f93810afd
    https://lists.x.org/archives/xorg-announce/2023-December/003435.html
    http://www.openwall.com/lists/oss-security/2023/12/13/1
    https://access.redhat.com/errata/RHSA-2023:7886
    https://access.redhat.com/errata/RHSA-2024:0006
    https://access.redhat.com/errata/RHSA-2024:0009
    https://access.redhat.com/errata/RHSA-2024:0010
    https://access.redhat.com/errata/RHSA-2024:0014
    https://access.redhat.com/errata/RHSA-2024:0015
    https://access.redhat.com/errata/RHSA-2024:0016
    https://access.redhat.com/errata/RHSA-2024:0017
    https://access.redhat.com/errata/RHSA-2024:0018
    https://access.redhat.com/errata/RHSA-2024:0020
    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/security/cve/CVE-2023-6377
    https://bugzilla.redhat.com/show_bug.cgi?id=2253291
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/0c1a93d319558fe3ab2d94f51d174b4f93810afd
    https://lists.debian.org/debian-lts-announce/2023/12/msg00008.html
    https://lists.debian.org/debian-lts-announce/2023/12/msg00013.html
    https://lists.fedoraproject.org/archives/list/[email protected]/message/6R63Z6GIWM3YUNZRCGFODUXLW3GY2HD6/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/7PP47YXKM5ETLCYEF6473R3VFCJ6QT2S/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/IFHV5KCQ2SVOD4QMCPZ5HC6YL44L7YJD/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/LJDFWDB7EQVZA45XDP7L5WRSRWS6RVRR/
    https://lists.x.org/archives/xorg-announce/2023-December/003435.html
    https://security.gentoo.org/glsa/202401-30
    https://security.netapp.com/advisory/ntap-20240125-0003/
    https://www.debian.org/security/2023/dsa-5576

    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