---
title: "CVE-2020-23922\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2020-23922?format=md
keywords: index, follow
---

# CVE-2020-23922

Publication date 21 April 2021

Last updated 25 August 2025

---

Ubuntu priority

**Low**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.1 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2020-23922?format=md#impact-score)

Toggle side navigation

## Description

An issue was discovered in giflib through 5.1.4. DumpScreen2RGB in
gif2rgb.c has a heap-based buffer over-read.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2020-23922?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| giflib | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Ignored end of life, was deferred [2024-02-02] |
| 22.10 kinetic | Ignored end of life, was deferred [2024-02-02] |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.10 groovy | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2020-23922?format=md#patch-details)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

one of the commits listes below likely fixes this issue.

---

### [gianz](https://launchpad.net/~gianz)

looks like the patch for CVE-2016-3977 fixes the issue.

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| giflib | * Upstream:   <https://sourceforge.net/p/giflib/code/ci/368f28c0034ecfb6dd4b3412af4cc589a56e0611/> * Upstream:   <https://sourceforge.net/p/giflib/code/ci/fd0f408bd6dbc6ca33f0593d17164f9cb113a8ce/> * Upstream:   <https://sourceforge.net/p/giflib/code/ci/ccbc956432650734c91acb3fc88837f7b81267ff/> * Upstream:   <https://sourceforge.net/p/giflib/code/ci/ea8dbc5786862a3e16a5acfa3d24e2c2f608cd88/> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.1 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | Required |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.1 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-23922)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-23922)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-23922)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-23922)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2020-23922>