The vulnerability of the x86 HVM Hypercall Handler component of the cross-platform hypervisor Xen in the Linux operating system allows a attacker to trigger a service failure.

The vulnerability of the x86 HVM Hypercall Handler component in the cross-platform hypervisor Xen for Linux operating systems is related to the ability to freely switch between 64-bit and other system modes. Exploiting this vulnerability could allow an attacker to trigger a service failure...

Xen - Broken Check in memory_exchange() Permits PV Guest Breakout

Xen - Broken Check in memoryexchange Permits PV Guest Breakout Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1184 This bug report describes a vulnerability in memoryexchange that permits PV guest kernels to write to an arbitrary virtual address with hypervisor privileges. The...

SUSE-SU-2015:1479-1 Security update for xen

xen was updated to fix the following security issues: CVE-2015-5165: QEMU leak of uninitialized heap memory in rtl8139 device model bsc939712, XSA-140 CVE-2015-5166: Use after free in QEMU/Xen block unplug protocol bsc939709, XSA-139 CVE-2015-2751: Certain domctl operations could have be used to...

FreeBSD : xen-kernel -- vulnerability in the iret hypercall handler (8c31b288-27ec-11e5-a4a5-002590263bf5)

The Xen Project reports : A buggy loop in Xen's compatiret function iterates the wrong way around a 32-bit index. Any 32-bit PV guest kernel can trigger this vulnerability by attempting a hypercalliret with EFLAGS.VM set. Given the use of get/putuser, and that the virtual addresses in question ar...

Fedora 22 : xen-4.5.0-11.fc22 (2015-10001)

stubs-32.h is back, so revert to previous behaviour. Heap overflow in QEMU PCNET controller, allowing guest-host escape XSA-135, CVE-2015-3209. GNTTABOPswapgrantref operation misbehavior XSA-134, CVE-2015-4163. vulnerability in the iret hypercall handler XSA-136, CVE-2015-4164. Note that Tenable...

Fedora 20 : xen-4.3.4-6.fc20 (2015-9965)

Heap overflow in QEMU PCNET controller, allowing guest-host escape XSA-135, CVE-2015-3209 1230537 GNTTABOPswapgrantref operation misbehavior XSA-134, CVE-2015-4163 vulnerability in the iret hypercall handler XSA-136, CVE-2015-4164 Potential unintended writes to host MSI message data field via qem...

Security update for xen (important)

Xen was updated to fix eight vulnerabilities. The following vulnerabilities were fixed: CVE-2015-2751: Certain domctl operations may be abused to lock up the host XSA-127 boo922709 CVE-2015-4103: Potential unintended writes to host MSI message data field via qemu XSA-128 boo931625 CVE-2015-4104:...

DSA-3286-1 xen - security update

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Citrix XenServer Multiple Security Updates (CTX201145)

A number of security vulnerabilities have been identified in Citrix XenServer that may allow a malicious administrator of a guest VM to crash the host. These vulnerabilities affect all currently supported versions of Citrix XenServer up to and including Citrix XenServer 6.5 Service Pack 1...