# CVE-2017-18922: libvncserver: LibVNCServer is a C library that enables you to implement VNC server functionality into own programs.  Security Fix(e...

CVE-2017-18922 is fixed in 5 products on 1 platform, first by libvncclient1 0.9.11+dfsg-1ubuntu1.2, released June 30, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-18922
- Priority: High
- CVSS: 9.8 (Important)
- EPSS: 0.0226
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 30, 2020

## Description

LibVNCServer is a C library that enables you to implement VNC server functionality into own programs.  Security Fix(es):  * libvncserver: websocket decoding buffer overflow (CVE-2017-18922)  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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libvncclient1 Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.2 | [libvncclient1 0.9.11+dfsg-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvncclient1-0.9.11-dfsg-1ubuntu1.2.md) | Jun 30, 2020 |
| Linux | libvncclient1 Ubuntu 20.04 LTS (focal) | 0.9.12+dfsg-9ubuntu0.1 | [libvncclient1 0.9.12+dfsg-9ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libvncclient1-0.9.12-dfsg-9ubuntu0.1.md) | Jun 30, 2020 |
| Linux | libvncserver RHEL 8 | 0:0.9.11-15.el8_2.1 | [RHSA-2020:3385](https://patchblox.com/security/data/fix/linux/rhsa-2020-3385.md) | Aug 10, 2020 |
| Linux | libvncserver ol 8 | 0:0.9.11-15.el8_2.1 | [ELSA-2020-3385](https://patchblox.com/security/data/fix/linux/elsa-2020-3385.md) | Aug 10, 2020 |
| Linux | libvncserver-config Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.2 | [libvncserver-config 0.9.11+dfsg-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvncserver-config-0.9.11-dfsg-1ubuntu1.2.md) | Jun 30, 2020 |
| Linux | libvncserver-devel RHEL 8 | 0:0.9.11-15.el8_2.1 | [RHSA-2020:3385](https://patchblox.com/security/data/fix/linux/rhsa-2020-3385.md) | Aug 10, 2020 |
| Linux | libvncserver-devel ol 8 | 0:0.9.11-15.el8_2.1 | [ELSA-2020-3385](https://patchblox.com/security/data/fix/linux/elsa-2020-3385.md) | Aug 10, 2020 |
| Linux | libvncserver1 Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.2 | [libvncserver1 0.9.11+dfsg-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvncserver1-0.9.11-dfsg-1ubuntu1.2.md) | Jun 30, 2020 |
| Linux | libvncserver1 Ubuntu 20.04 LTS (focal) | 0.9.12+dfsg-9ubuntu0.1 | [libvncserver1 0.9.12+dfsg-9ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libvncserver1-0.9.12-dfsg-9ubuntu0.1.md) | Jun 30, 2020 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo