ALSA-2023:2786

    Dashboard / Vulnerabilities / ALSA-2023:2786

    ALSA-2023:2786

    Published: 16 May 2023Last Modified: 4 Feb 2026
    Aliases:
    CVE-2021-3782

    Summary: Moderate: wayland security, bug fix, and enhancement update

    Details: Wayland is a protocol for a compositor to talk to its clients, as well as a C library implementation of that protocol. The compositor can be a standalone display server running on Linux kernel modesetting and evdev input devices, an X application, or a wayland client itself. The clients can be traditional applications, X servers (rootless or fullscreen) or other display servers. The following packages have been upgraded to a later upstream version: wayland (1.21.0). (BZ#2137625) Security Fix(es): * wayland: libwayland-server wl_shm reference-count overflow (CVE-2021-3782) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

    References: https://access.redhat.com/errata/RHSA-2023:2786, https://access.redhat.com/security/cve/CVE-2021-3782, https://bugzilla.redhat.com/2002627, https://errata.almalinux.org/8/ALSA-2023-2786.html

    Affected packages

    Package

    Name: libwayland-client

    Purl: pkg:rpm/almalinux/libwayland-client

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.21.0-1.el8

    Affected versions

    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
    ALSA-2023:2786 | CVE-DB