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No exploitation reportedFix available

CVE-2021-40633

No exploitation reported by the sources we read.

  • Published2022-06-14
  • WeaknessCWE-401

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.

Timeline

dates in UTC
  1. 2022-06-1411:15CVE publishedNVD

Versions per branch

NVD
Giflib project giflib
BranchAffectedFixed in
5.1= 5.1.4no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • giflibUbuntu:Pro:18.04:LTSall versions · fixed in 5.1.4-2ubuntu0.1+esm1
  • giflibUbuntu:Pro:16.04:LTSall versions · fixed in 5.1.4-0.3~16.04.1+esm1
  • giflibUbuntu:22.04:LTSall versions · fixed in 5.1.9-2ubuntu0.1
  • giflibUbuntu:20.04:LTSall versions · fixed in 5.1.9-1ubuntu0.1
  • giflibSUSE:Manager Server 4.3all versions · fixed in 5.2.2-150000.4.13.1
  • giflibSUSE:Manager Proxy 4.3all versions · fixed in 5.2.2-150000.4.13.1
  • giflibSUSE:Linux Enterprise Software Development Kit 12 SP5all versions · fixed in 5.0.5-13.3.1
  • giflibSUSE:Linux Enterprise Server for SAP Applications 15 SP4all versions · fixed in 5.2.2-150000.4.13.1

39 more package ranges on OSV.dev

Vendor advisories

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2022-06-14
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-77hm-q3fv-fq9x

Frequently asked questions

What is CVE-2021-40633?

A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.

Is CVE-2021-40633 actively exploited?

Active exploitation of CVE-2021-40633 has not been confirmed. Its EPSS score was 1.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-40633?

CVE-2021-40633 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record