MitreCVELIST:CVE-2015-4164CVE-2015-4164
The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.
References
lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html
lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html
lists.opensuse.org/opensuse-security-announce/2015-06/msg00029.html
lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html
lists.opensuse.org/opensuse-security-announce/2015-07/msg00014.html
lists.opensuse.org/opensuse-security-announce/2015-09/msg00027.html
support.citrix.com/article/CTX201145
www.debian.org/security/2015/dsa-3286
www.securityfocus.com/bid/75149
www.securitytracker.com/id/1032569
xenbits.xen.org/xsa/advisory-136.html
security.gentoo.org/glsa/201604-03
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