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No exploitation reportedFix available

CVE-2021-3476

No exploitation reported by the sources we read.

  • Published2021-03-30
  • Fixed in2.5.4 · 2.4.3
  • WeaknessCWE-190

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's B44 uncompression functionality in versions before 3.0.0-beta. An attacker who is able to submit a crafted file to OpenEXR could trigger shift overflows, potentially affecting application availability.

Timeline

dates in UTC
  1. 2021-03-3018:15CVE 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:20.04:LTSall versions · fixed in 2.3.0-6ubuntu0.5
  • openexrUbuntu:18.04:LTSall versions · fixed in 2.2.0-11.1ubuntu1.6
  • openexrUbuntu:16.04:LTSall versions · fixed in 2.2.0-10ubuntu2.6
  • openexrSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 2.1.0-6.37.1
  • openexrSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 2.1.0-6.37.1
  • openexrSUSE:OpenStack Cloud 9all versions · fixed in 2.1.0-6.37.1
  • openexrSUSE:OpenStack Cloud 8all versions · fixed in 2.1.0-6.37.1
  • openexrSUSE:Manager Server 4.0all versions · fixed in 2.2.1-3.35.1

49 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
2021-03-30
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-xxv7-22hc-322m

Frequently asked questions

What is CVE-2021-3476?

A flaw was found in OpenEXR's B44 uncompression functionality in versions before 3.0.0-beta. An attacker who is able to submit a crafted file to OpenEXR could trigger shift overflows, potentially affecting application availability.

Is CVE-2021-3476 actively exploited?

Active exploitation of CVE-2021-3476 has not been confirmed. Its EPSS score was 1.8% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-3476?

CVE-2021-3476 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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Sources for this record