# CVE-2021-3472: xdmx: A flaw was found in xorg-x11-server in versions before 1.20.11

CVE-2021-3472 is fixed in 18 products on 1 platform, first by xdmx 2:1.19.6-1ubuntu4.9, released April 13, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3472
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0105
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 13, 2021

## Description

A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xdmx Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xdmx 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xdmx-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xdmx Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xdmx 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xdmx-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xdmx-tools Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xdmx-tools 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xdmx-tools-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xdmx-tools Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xdmx-tools 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xdmx-tools-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xmir Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xmir 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xmir-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xnest Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xnest 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xnest-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xnest Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xnest 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xnest-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xorg-server-source Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xorg-server-source 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xorg-server-source-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xorg-server-source Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xorg-server-source 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xorg-server-source-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xorg-server-source-hwe-18.04 Ubuntu 18.04.6 LTS (bionic) | 2:1.20.8-2ubuntu2.2~18.04.5 | [xorg-server-source-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xorg-server-source-hwe-18.04-2-1.20.8-2ubuntu2.2-18.04.5.md) | Apr 13, 2021 |
| Linux | xserver-common Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xserver-common 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-common-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xserver-common Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xserver-common 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xserver-common-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xserver-xephyr Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xserver-xephyr 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xephyr-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xserver-xephyr Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xserver-xephyr 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xserver-xephyr-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xserver-xephyr-hwe-18.04 Ubuntu 18.04.6 LTS (bionic) | 2:1.20.8-2ubuntu2.2~18.04.5 | [xserver-xephyr-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xephyr-hwe-18.04-2-1.20.8-2ubuntu2.2-18.04.5.md) | Apr 13, 2021 |
| Linux | xserver-xorg-core Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xserver-xorg-core 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xorg-core-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xserver-xorg-core Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xserver-xorg-core-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xserver-xorg-core-hwe-18.04 Ubuntu 18.04.6 LTS (bionic) | 2:1.20.8-2ubuntu2.2~18.04.5 | [xserver-xorg-core-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xorg-core-hwe-18.04-2-1.20.8-2ubuntu2.2-18.04.5.md) | Apr 13, 2021 |
| Linux | xserver-xorg-dev-hwe-18.04 Ubuntu 18.04.6 LTS (bionic) | 2:1.20.8-2ubuntu2.2~18.04.5 | [xserver-xorg-dev-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xorg-dev-hwe-18.04-2-1.20.8-2ubuntu2.2-18.04.5.md) | Apr 13, 2021 |
| Linux | xserver-xorg-legacy Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xserver-xorg-legacy 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xorg-legacy-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xserver-xorg-legacy Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xserver-xorg-legacy 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xserver-xorg-legacy-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xserver-xorg-legacy-hwe-18.04 Ubuntu 18.04.6 LTS (bionic) | 2:1.20.8-2ubuntu2.2~18.04.5 | [xserver-xorg-legacy-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xorg-legacy-hwe-18.04-2-1.20.8-2ubuntu2.2-18.04.5.md) | Apr 13, 2021 |
| Linux | xserver-xorg-xmir Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xserver-xorg-xmir 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xserver-xorg-xmir-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xvfb Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xvfb 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xvfb-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xvfb Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xvfb 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xvfb-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xwayland Ubuntu 18.04.6 LTS (bionic) | 2:1.19.6-1ubuntu4.9 | [xwayland 2:1.19.6-1ubuntu4.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xwayland-2-1.19.6-1ubuntu4.9.md) | Apr 13, 2021 |
| Linux | xwayland Ubuntu 20.04 LTS (focal) | 2:1.20.9-2ubuntu1.2~20.04.2 | [xwayland 2:1.20.9-2ubuntu1.2~20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xwayland-2-1.20.9-2ubuntu1.2-20.04.2.md) | Apr 13, 2021 |
| Linux | xwayland-hwe-18.04 Ubuntu 18.04.6 LTS (bionic) | 2:1.20.8-2ubuntu2.2~18.04.5 | [xwayland-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xwayland-hwe-18.04-2-1.20.8-2ubuntu2.2-18.04.5.md) | Apr 13, 2021 |

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