Xen 4.4.x and earlier, when using a large number of VCPUs, does not properly handle read and write locks, which allows local x86 guest users to cause a denial of service (write denial or NMI watchdog timeout and host crash) via a large number of read requests, a different vulnerability than CVE-2014-9065.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Xen | Xen | * | 4.4.1 (including) |
| Xen | Ubuntu | devel | * |
| Xen | Ubuntu | trusty | * |
| Xen | Ubuntu | utopic | * |
| Xen-3.3 | Ubuntu | upstream | * |
References
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- http://www.openwall.com/lists/oss-security/2014/12/08/4
- http://www.securityfocus.com/bid/71546
- http://xenbits.xen.org/xsa/advisory-114.html
- https://security.gentoo.org/glsa/201504-04
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- http://www.openwall.com/lists/oss-security/2014/12/08/4
- http://www.securityfocus.com/bid/71546
- http://xenbits.xen.org/xsa/advisory-114.html
- https://security.gentoo.org/glsa/201504-04