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Vulnerability record · CVE-2020-23922 · published 21 April 2021

CVE-2020-23922: Giflib project giflib out-of-bounds read vulnerability

GGiflib Project · Giflib

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

7.1 CVSS 3.1 High EPSS 2.2% · top 17.9% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score, v2 5.8
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cwe.mitre.org/data/definitions/126.html Technical DescriptionThird Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.ap
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.ap
https://sourceforge.net/p/giflib/bugs/151/ ExploitThird Party Advisory
https://cwe.mitre.org/data/definitions/126.html Technical DescriptionThird Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.ap
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.ap
https://sourceforge.net/p/giflib/bugs/151/ ExploitThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-23922), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.