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CVE-2015-7972

2.1 · LOW

The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools/libxl/libxl_dom.c in Xen 3.4.x through 4.6.x do not properly calculate the balloon size w…

Published Oct 30, 2015xenCWE-399EPSS 0.43%

Overview

CVE-2015-7972 is a low-severity vulnerability affecting xen xen. It was published on October 30, 2015 and has a CVSS 2.0 base score of 2.1 (LOW).

This vulnerability has a CVSS 2.0 base score of 2.1, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools/libxl/libxl_dom.c in Xen 3.4.x through 4.6.x do not properly calculate the balloon size when using the populate-on-demand (PoD) system, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors related to "heavy memory pressure."

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/2015-11/msg00063.htmlRefsupport.citrix.com/article/CTX202404Refwww.debian.org/security/2015/dsa-3414Refwww.securityfocus.com/bid/77365Refwww.securitytracker.com/id/1034036Refxenbits.xen.org/xsa/advisory-153.htmlRefsecurity.gentoo.org/glsa/201604-03

How CyberStrike helps

Frequently asked questions

What is CVE-2015-7972?

CVE-2015-7972 is a low-severity vulnerability affecting xen xen. It was published on October 30, 2015 and has a CVSS 2.0 base score of 2.1 (LOW).

How severe is CVE-2015-7972?

This vulnerability has a CVSS 2.0 base score of 2.1, rated LOW. 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-2015-7972?

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-2015-7972?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-7972 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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