CVE-2026-93520

    Dashboard / Vulnerabilities / CVE-2026-93520

    CVE-2026-93520

    Published: 28 Oct 2026Last Modified: 8 Nov 2026

    Summary: X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write

    Details: A heap buffer overflow caused by mismatching size calculations between XkbAllocNames and ChangeKeycodeRange in X.org X server before 2.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93520.json, https://nvd.nist.gov/vuln/detail/CVE-2026-93520, https://gitlab.freedesktop.org/xorg/xserver/-/commit/b941a473e06f26a407a9adb15759be79f7418e86, https://gitlab.freedesktop.org/xorg/xserver

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -edc1b378f804ef5bf286318057e0b935f91f22b7

    Affected versions

    xwayland-24.1.13
    xwayland-24.1.12
    xwayland-24.1.11
    xwayland-24.1.10
    xwayland-24.1.9
    xwayland-24.1.8
    xwayland-24.1.7
    xwayland-24.1.6
    xwayland-24.1.5
    xwayland-24.1.4
    xwayland-24.1.3
    xwayland-24.1.2
    xwayland-24.1.1
    xwayland-24.1.0

    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
    CVE-2026-93520 | CVE-DB