# CVE-2020-21890: ghostscript: Buffer Overflow vulnerability in clj_media_size function in devices/gdevclj.c in Artifex Ghostscript 9.50 allows remo...

CVE-2020-21890 is fixed in 4 products on 1 platform, first by ghostscript 9.26~dfsg+0-0ubuntu0.18.04.18+esm2, released August 22, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-21890
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0081
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 22, 2023

## Description

Buffer Overflow vulnerability in clj_media_size function in devices/gdevclj.c in Artifex Ghostscript 9.50 allows remote attackers to cause a denial of service or other unspecified impact(s) via opening of crafted PDF document.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ghostscript Debian 12.15 (bookworm) | 9.51~dfsg-1 | [DEBIAN-CVE-2020-21890](https://patchblox.com/security/data/fix/linux/debian-cve-2020-21890.md) | Aug 22, 2023 |
| Linux | ghostscript Debian 13.5 (trixie) | 9.51~dfsg-1 | [DEBIAN-CVE-2020-21890](https://patchblox.com/security/data/fix/linux/debian-cve-2020-21890.md) | Aug 22, 2023 |
| Linux | ghostscript Debian 14 | 9.51~dfsg-1 | [DEBIAN-CVE-2020-21890](https://patchblox.com/security/data/fix/linux/debian-cve-2020-21890.md) | Aug 22, 2023 |
| Linux | ghostscript Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.18+esm2 | [ghostscript 9.26~dfsg+0-0ubuntu0.18.04.18+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ghostscript-9.26-dfsg-0-0ubuntu0.18.04.18-esm2.md) | Aug 22, 2023 |
| Linux | ghostscript Ubuntu 20.04 LTS (focal) | 9.50~dfsg-5ubuntu4.10 | [ghostscript 9.50~dfsg-5ubuntu4.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ghostscript-9.50-dfsg-5ubuntu4.10.md) | Aug 22, 2023 |
| Linux | ghostscript-x Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.18+esm2 | [ghostscript-x 9.26~dfsg+0-0ubuntu0.18.04.18+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ghostscript-x-9.26-dfsg-0-0ubuntu0.18.04.18-esm2.md) | Aug 22, 2023 |
| Linux | ghostscript-x Ubuntu 20.04 LTS (focal) | 9.50~dfsg-5ubuntu4.10 | [ghostscript-x 9.50~dfsg-5ubuntu4.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ghostscript-x-9.50-dfsg-5ubuntu4.10.md) | Aug 22, 2023 |
| Linux | libgs9 Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.18+esm2 | [libgs9 9.26~dfsg+0-0ubuntu0.18.04.18+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgs9-9.26-dfsg-0-0ubuntu0.18.04.18-esm2.md) | Aug 22, 2023 |
| Linux | libgs9 Ubuntu 20.04 LTS (focal) | 9.50~dfsg-5ubuntu4.10 | [libgs9 9.50~dfsg-5ubuntu4.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgs9-9.50-dfsg-5ubuntu4.10.md) | Aug 22, 2023 |
| Linux | libgs9-common Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.18+esm2 | [libgs9-common 9.26~dfsg+0-0ubuntu0.18.04.18+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgs9-common-9.26-dfsg-0-0ubuntu0.18.04.18-esm2.md) | Aug 22, 2023 |
| Linux | libgs9-common Ubuntu 20.04 LTS (focal) | 9.50~dfsg-5ubuntu4.10 | [libgs9-common 9.50~dfsg-5ubuntu4.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgs9-common-9.50-dfsg-5ubuntu4.10.md) | Aug 22, 2023 |

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Data as of 2026-11-08T06:59:42Z 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

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