Is CVE-2021-20296 actively exploited?

CVE-2021-20296 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-20296?

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

How do I patch CVE-2021-20296?

Patch guidance is available from openexr security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-20296.

CVE-2021-20296 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-20296?

4 products: openexr openexr, openexr openexr, debian debian linux, debian debian linux.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low
Weaknesses: CWE-476 · NULL Pointer Dereference

Metadata

Primary Vendor: OPENEXR
Published: 4/1/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

openexr : openexropenexr : openexrdebian : debian_linuxdebian : debian_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-20296. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-20296

View on NIST NVD

CVE-2021-20296 vulnerability