CVE-2015-7972
First published: Fri Oct 30 2015(Updated: )
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."
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen xen-unstable | =3.4.0 | |
| Xen xen-unstable | =3.4.1 | |
| Xen xen-unstable | =3.4.2 | |
| Xen xen-unstable | =3.4.3 | |
| Xen xen-unstable | =3.4.4 | |
| Xen xen-unstable | =4.0.0 | |
| Xen xen-unstable | =4.0.1 | |
| Xen xen-unstable | =4.0.2 | |
| Xen xen-unstable | =4.0.3 | |
| Xen xen-unstable | =4.0.4 | |
| Xen xen-unstable | =4.1.0 | |
| Xen xen-unstable | =4.1.1 | |
| Xen xen-unstable | =4.1.2 | |
| Xen xen-unstable | =4.1.3 | |
| Xen xen-unstable | =4.1.4 | |
| Xen xen-unstable | =4.1.5 | |
| Xen xen-unstable | =4.1.6.1 | |
| Xen xen-unstable | =4.2.0 | |
| Xen xen-unstable | =4.2.1 | |
| Xen xen-unstable | =4.2.2 | |
| Xen xen-unstable | =4.2.3 | |
| Xen xen-unstable | =4.3.0 | |
| Xen xen-unstable | =4.3.1 | |
| Xen xen-unstable | =4.3.2 | |
| Xen xen-unstable | =4.3.4 | |
| Xen xen-unstable | =4.4.0 | |
| Xen xen-unstable | =4.4.1 | |
| Xen xen-unstable | =4.5.0 | |
| Xen xen-unstable | =4.5.1 | |
| Xen xen-unstable | =4.6.0 |
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Reference Links
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html
- http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html
- http://support.citrix.com/article/CTX202404
- http://www.debian.org/security/2015/dsa-3414
- http://www.securityfocus.com/bid/77365
- http://www.securitytracker.com/id/1034036
- http://xenbits.xen.org/xsa/advisory-153.html
- https://security.gentoo.org/glsa/201604-03
Frequently Asked Questions
What is the severity of CVE-2015-7972?
CVE-2015-7972 has a severity rating that indicates a potential denial of service vulnerability in Xen.
How do I fix CVE-2015-7972?
To fix CVE-2015-7972, ensure your Xen installation is updated to a version that includes the official patches.
What versions of Xen are affected by CVE-2015-7972?
CVE-2015-7972 affects Xen versions from 3.4.x through 4.6.x, including specific versions noted in the CVE.
What type of attack does CVE-2015-7972 facilitate?
CVE-2015-7972 facilitates a denial of service attack by allowing local HVM guest users to manipulate memory allocation.
Is there a workaround for CVE-2015-7972?
There are no specific workarounds for CVE-2015-7972, so upgrading to a patched version is recommended.
- agent/references
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- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/weakness
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- agent/severity
- agent/author
- agent/description
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- agent/event
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/3.4.0
- version/xen xen-unstable/3.4.1
- version/xen xen-unstable/3.4.2
- version/xen xen-unstable/3.4.3
- version/xen xen-unstable/3.4.4
- version/xen xen-unstable/4.0.0
- version/xen xen-unstable/4.0.1
- version/xen xen-unstable/4.0.2
- version/xen xen-unstable/4.0.3
- version/xen xen-unstable/4.0.4
- version/xen xen-unstable/4.1.0
- version/xen xen-unstable/4.1.1
- version/xen xen-unstable/4.1.2
- version/xen xen-unstable/4.1.3
- version/xen xen-unstable/4.1.4
- version/xen xen-unstable/4.1.5
- version/xen xen-unstable/4.1.6.1
- version/xen xen-unstable/4.2.0
- version/xen xen-unstable/4.2.1
- version/xen xen-unstable/4.2.2
- version/xen xen-unstable/4.2.3
- version/xen xen-unstable/4.3.0
- version/xen xen-unstable/4.3.1
- version/xen xen-unstable/4.3.2
- version/xen xen-unstable/4.3.4
- version/xen xen-unstable/4.4.0
- version/xen xen-unstable/4.4.1
- version/xen xen-unstable/4.5.0
- version/xen xen-unstable/4.5.1
- version/xen xen-unstable/4.6.0