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No exploitation reportedFix available

CVE-2021-20296

No exploitation reported by the sources we read.

  • Published2021-04-01
  • Fixed in2.5.4 · 2.4.3
  • WeaknessCWE-476

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 flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is processed by the Dwa decompression functionality of OpenEXR's IlmImf library, could cause a NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Timeline

dates in UTC
  1. 2021-04-0114:15CVE publishedNVD

Versions per branch

NVD
Openexr
BranchAffectedFixed in
2.5≥ 2.5.0, < 2.5.42.5.4
2.4< 2.4.32.4.3
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no 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

  • openexrUbuntu:Pro:22.04:LTSall versions · fixed in 2.5.7-1ubuntu0.1~esm1
  • openexrUbuntu:Pro:20.04:LTSall versions · fixed in 2.3.0-6ubuntu0.5+esm1
  • openexrUbuntu:Pro:16.04:LTSall versions · fixed in 2.2.0-10ubuntu2.6+esm1
  • openexrUbuntu:18.04:LTSall versions · fixed in 2.2.0-11.1ubuntu1.7
  • openexrSUSE:Linux Enterprise Module for Desktop Applications 15 SP3all versions · fixed in 2.2.1-3.27.1
  • openexrSUSE:Linux Enterprise Module for Desktop Applications 15 SP2all versions · fixed in 2.2.1-3.27.1
  • openexropenSUSE:Leap 15.2all versions · fixed in 2.2.1-lp152.7.14.1
  • openexrMageia:8all versions · fixed in 2.5.7-1.mga8

19 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Openexr to 2.5.4 · 2.4.3

Advisories and patches

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:N/S:U/C:N/I:N/A:L
Published
2021-04-01
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h585-99w7-8g9c

Frequently asked questions

What is CVE-2021-20296?

A flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is processed by the Dwa decompression functionality of OpenEXR's IlmImf library, could cause a NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Is CVE-2021-20296 actively exploited?

Active exploitation of CVE-2021-20296 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-2021-20296?

CVE-2021-20296 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

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