# CVE-2021-3782: libwayland-egl: Wayland is a protocol for a compositor to talk to its clients, as well as a C library implementation of that protocol CVE-2021-3782 is fixed in 19 products on 1 platform, first by libwayland-bin 1.16.0-1ubuntu1.1~18.04.4, released August 30, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2021-3782 - Priority: High - CVSS: 9.8 (Moderate) - EPSS: 0.0032 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 30, 2022 ## Description 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 Red Hat Enterprise Linux 8.8 Release Notes linked from the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libwayland-bin Ubuntu 18.04.6 LTS (bionic) | 1.16.0-1ubuntu1.1~18.04.4 | [libwayland-bin 1.16.0-1ubuntu1.1~18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwayland-bin-1.16.0-1ubuntu1.1-18.04.4.md) | Aug 30, 2022 | | Linux | libwayland-bin Ubuntu 20.04 LTS (focal) | 1.18.0-1ubuntu0.1 | [libwayland-bin 1.18.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwayland-bin-1.18.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-bin Ubuntu 22.04.1 LTS (jammy) | 1.20.0-1ubuntu0.1 | [libwayland-bin 1.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libwayland-bin-1.20.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-client RHEL 8 | 0:1.21.0-1.el8 | [RHSA-2023:2786](https://patchblox.com/security/data/fix/linux/rhsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-client almalinux 8 | 1.21.0-1.el8 | [ALSA-2023:2786](https://patchblox.com/security/data/fix/linux/alsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-client amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-client ol 8 | 0:1.21.0-1.el8 | [ELSA-2023-2786](https://patchblox.com/security/data/fix/linux/elsa-2023-2786.md) | May 24, 2023 | | Linux | libwayland-client-debuginfo amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-client0 Ubuntu 18.04.6 LTS (bionic) | 1.16.0-1ubuntu1.1~18.04.4 | [libwayland-client0 1.16.0-1ubuntu1.1~18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwayland-client0-1.16.0-1ubuntu1.1-18.04.4.md) | Aug 30, 2022 | | Linux | libwayland-client0 Ubuntu 20.04 LTS (focal) | 1.18.0-1ubuntu0.1 | [libwayland-client0 1.18.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwayland-client0-1.18.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-client0 Ubuntu 22.04.1 LTS (jammy) | 1.20.0-1ubuntu0.1 | [libwayland-client0 1.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libwayland-client0-1.20.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-cursor RHEL 8 | 0:1.21.0-1.el8 | [RHSA-2023:2786](https://patchblox.com/security/data/fix/linux/rhsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-cursor almalinux 8 | 1.21.0-1.el8 | [ALSA-2023:2786](https://patchblox.com/security/data/fix/linux/alsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-cursor amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-cursor ol 8 | 0:1.21.0-1.el8 | [ELSA-2023-2786](https://patchblox.com/security/data/fix/linux/elsa-2023-2786.md) | May 24, 2023 | | Linux | libwayland-cursor-debuginfo amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-cursor0 Ubuntu 18.04.6 LTS (bionic) | 1.16.0-1ubuntu1.1~18.04.4 | [libwayland-cursor0 1.16.0-1ubuntu1.1~18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwayland-cursor0-1.16.0-1ubuntu1.1-18.04.4.md) | Aug 30, 2022 | | Linux | libwayland-cursor0 Ubuntu 20.04 LTS (focal) | 1.18.0-1ubuntu0.1 | [libwayland-cursor0 1.18.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwayland-cursor0-1.18.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-cursor0 Ubuntu 22.04.1 LTS (jammy) | 1.20.0-1ubuntu0.1 | [libwayland-cursor0 1.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libwayland-cursor0-1.20.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-egl RHEL 8 | 0:1.21.0-1.el8 | [RHSA-2023:2786](https://patchblox.com/security/data/fix/linux/rhsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-egl almalinux 8 | 1.21.0-1.el8 | [ALSA-2023:2786](https://patchblox.com/security/data/fix/linux/alsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-egl amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-egl ol 8 | 0:1.21.0-1.el8 | [ELSA-2023-2786](https://patchblox.com/security/data/fix/linux/elsa-2023-2786.md) | May 24, 2023 | | Linux | libwayland-egl-debuginfo amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-egl1 Ubuntu 18.04.6 LTS (bionic) | 1.16.0-1ubuntu1.1~18.04.4 | [libwayland-egl1 1.16.0-1ubuntu1.1~18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwayland-egl1-1.16.0-1ubuntu1.1-18.04.4.md) | Aug 30, 2022 | | Linux | libwayland-egl1 Ubuntu 20.04 LTS (focal) | 1.18.0-1ubuntu0.1 | [libwayland-egl1 1.18.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwayland-egl1-1.18.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-egl1 Ubuntu 22.04.1 LTS (jammy) | 1.20.0-1ubuntu0.1 | [libwayland-egl1 1.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libwayland-egl1-1.20.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-server RHEL 8 | 0:1.21.0-1.el8 | [RHSA-2023:2786](https://patchblox.com/security/data/fix/linux/rhsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-server almalinux 8 | 1.21.0-1.el8 | [ALSA-2023:2786](https://patchblox.com/security/data/fix/linux/alsa-2023-2786.md) | May 16, 2023 | | Linux | libwayland-server amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-server ol 8 | 0:1.21.0-1.el8 | [ELSA-2023-2786](https://patchblox.com/security/data/fix/linux/elsa-2023-2786.md) | May 24, 2023 | | Linux | libwayland-server-debuginfo amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | libwayland-server0 Ubuntu 18.04.6 LTS (bionic) | 1.16.0-1ubuntu1.1~18.04.4 | [libwayland-server0 1.16.0-1ubuntu1.1~18.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwayland-server0-1.16.0-1ubuntu1.1-18.04.4.md) | Aug 30, 2022 | | Linux | libwayland-server0 Ubuntu 20.04 LTS (focal) | 1.18.0-1ubuntu0.1 | [libwayland-server0 1.18.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwayland-server0-1.18.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | libwayland-server0 Ubuntu 22.04.1 LTS (jammy) | 1.20.0-1ubuntu0.1 | [libwayland-server0 1.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libwayland-server0-1.20.0-1ubuntu0.1.md) | Aug 30, 2022 | | Linux | wayland Debian 12.15 (bookworm) | 1.21.0-1 | [DEBIAN-CVE-2021-3782](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3782.md) | Sep 23, 2022 | | Linux | wayland Debian 13.5 (trixie) | 1.21.0-1 | [DEBIAN-CVE-2021-3782](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3782.md) | Sep 23, 2022 | | Linux | wayland Debian 14 | 1.21.0-1 | [DEBIAN-CVE-2021-3782](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3782.md) | Sep 23, 2022 | | Linux | wayland rocky 8 | 0:1.21.0-1.el8 | [RLSA-2023:2786](https://patchblox.com/security/data/fix/linux/rlsa-2023-2786.md) | Jun 27, 2026 | | Linux | wayland-debuginfo amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | wayland-debugsource amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | wayland-devel RHEL 8 | 0:1.21.0-1.el8 | [RHSA-2023:2786](https://patchblox.com/security/data/fix/linux/rhsa-2023-2786.md) | May 16, 2023 | | Linux | wayland-devel almalinux 8 | 1.21.0-1.el8 | [ALSA-2023:2786](https://patchblox.com/security/data/fix/linux/alsa-2023-2786.md) | May 16, 2023 | | Linux | wayland-devel amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | wayland-devel ol 8 | 0:1.21.0-1.el8 | [ELSA-2023-2786](https://patchblox.com/security/data/fix/linux/elsa-2023-2786.md) | May 24, 2023 | | Linux | wayland-devel-debuginfo amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | | Linux | wayland-doc amzn 2023 | 1.22.0-1.amzn2023.0.1 | [ALAS2023-2023-203](https://patchblox.com/security/data/fix/linux/alas2023-2023-203.md) | Jun 5, 2023 | --- Data as of 2026-11-09T01:18:40Z UTC. 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