CVE-2015-7972: n/a vulnerability

CVE-2015-7972: The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 08:06 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2015-7972 is a Xen virtualization availability bug. Under heavy memory pressure, an affected HVM guest using populate-on-demand memory can crash because Xen miscalculates balloon memory sizing. The cited record describes guest denial of service, not host takeover or data exposure. Exposure is most likely in legacy Xen deployments running 3.4.x-4.6.x with HVM guests and populate-on-demand memory enabled. Modern supported Xen stacks are less likely exposed, but package lineage should be verified. Treat this as a legacy virtualization availability issue. It should be prioritized for environments still running old Xen branches, especially production or shared hosting platforms. It is not evidenced as actively exploited in the provided sources. Mitigation focus: Review Xen XSA-153 and applicable vendor advisories for fixed packages.; Upgrade Xen packages to vendor-supported versions that address CVE-2015-7972.; Prioritize legacy Xen hosts using HVM guests with PoD memory..

Prepared: Jun 13, 2026, 21:45 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 30, 2015, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
GLSA-201604-03CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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