CVE-2015-7970
First published: Fri Oct 30 2015(Updated: )
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.
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 |
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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/2015-12/msg00053.html
- http://support.citrix.com/article/CTX202404
- http://www.debian.org/security/2015/dsa-3414
- http://www.securityfocus.com/bid/77362
- http://www.securitytracker.com/id/1034034
- http://xenbits.xen.org/xsa/advisory-150.html
- https://security.gentoo.org/glsa/201604-03
Frequently Asked Questions
What is the severity of CVE-2015-7970?
CVE-2015-7970 is classified as a high severity vulnerability due to its ability to cause denial of service.
How do I fix CVE-2015-7970?
To fix CVE-2015-7970, upgrade to a patched version of Xen that addresses this issue.
What impact does CVE-2015-7970 have on affected systems?
CVE-2015-7970 can lead to excessive CPU consumption and may cause the system to reboot.
Which versions of Xen are affected by CVE-2015-7970?
CVE-2015-7970 affects Xen versions 3.4.x, 3.5.x, and 3.6.x.
Who is at risk from CVE-2015-7970?
Local x86 HVM guest administrators are at risk from CVE-2015-7970, as they can exploit the vulnerability to disrupt services.
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- collector/mitre-cve
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- agent/weakness
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- 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