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CVE-2015-7970

4.9 · MEDIUM

The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU co…

Published Oct 30, 2015xenCWE-399EPSS 0.44%

Overview

CVE-2015-7970 is a medium-severity vulnerability affecting xen xen. It was published on October 30, 2015 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU consumption and possibly reboot) via crafted memory contents that triggers a "time-consuming linear scan," related to Populate-on-Demand.

Remediation

Check the references section for vendor advisories and patches from xen. Update xen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Reflists.fedoraproject.org/pipermail/package-announce/2015-November/171082.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-November/171185.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-November/171249.htmlReflists.opensuse.org/opensuse-updates/2015-12/msg00053.htmlRefsupport.citrix.com/article/CTX202404Refwww.debian.org/security/2015/dsa-3414Refwww.securityfocus.com/bid/77362Refwww.securitytracker.com/id/1034034Refxenbits.xen.org/xsa/advisory-150.htmlRefsecurity.gentoo.org/glsa/201604-03

How CyberStrike helps

Frequently asked questions

What is CVE-2015-7970?

CVE-2015-7970 is a medium-severity vulnerability affecting xen xen. It was published on October 30, 2015 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

How severe is CVE-2015-7970?

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-7970?

Check the references section for vendor advisories and patches from xen. Update xen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-7970?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-7970 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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