CVE-2018-12891: Undefined Security Weakness

An issue was discovered in Xen through 4.10.x. Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions...

CVE-2018-12891

An issue was discovered in Xen through 4.10.x. Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions...

preemption checks bypassed in x86 PV MM handling

ISSUE DESCRIPTION Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions through its own page table...

OracleVM 3.3 / 3.4 : procps (OVMSA-2018-0226)

The remote OracleVM system is missing necessary patches to address critical security updates : - vmstat: fix invalid CPU utilization stats after vCPU hot-plug/unplug Konrad Rzeszutek Wilk bug 18011019 - drop leftover assignment in fix for CVE-2018-1124 causing a severe regression - Resolves:...

openSUSE: Security Advisory for xen (openSUSE-SU-2018:1274-1)

The remote host is missing an update for the Copyright C 2018 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:1184-1) (Meltdown)

This update for xen to version 4.9.2 fixes several issues. This feature was added : - Added script, udev rule and systemd service to watch for vcpu online/offline events in a HVM domU. They are triggered via 'xl vcpu-set domU N' These security issues were fixed : - CVE-2018-8897: Prevent...

SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:0909-1) (Meltdown) (Spectre)

This update for xen fixes the following issues: Update to Xen 4.7.5 bug fix only release bsc1027519 Security issues fixed : - CVE-2018-7540: Fixed DoS via non-preemptable L3/L4 pagetable freeing XSA-252 bsc1080635 - CVE-2018-7541: A grant table v2 - v1 transition may crash Xen XSA-255 bsc1080662 ...

SUSE-SU-2018:0909-1 Security update for xen

This update for xen fixes the following issues: Update to Xen 4.7.5 bug fix only release bsc1027519 Security issues fixed: - CVE-2018-7540: Fixed DoS via non-preemptable L3/L4 pagetable freeing XSA-252 bsc1080635 - CVE-2018-7541: A grant table v2 - v1 transition may crash Xen XSA-255 bsc1080662 -...

openSUSE Security Update : qemu (openSUSE-2018-8) (Spectre)

This update for qemu fixes the following issues : A new feature was added : - Support EPYC vCPU type bsc1052825 fate324038 Also a mitigation for a security problem has been applied : - CVE-2017-5715: QEMU was updated to allow passing through new MSR and CPUID flags from the host VM to the CPU, to...

ALPINE-CVE-2018-5244

In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service host OS memory consumption by rebooting many...

Security update for qemu (important)

This update for qemu fixes the following issues: A new feature was added: - Support EPYC vCPU type bsc1052825 fate324038 Also a mitigation for a security problem has been applied: - CVE-2017-5715: QEMU was updated to allow passing through new MSR and CPUID flags from the host VM to the CPU, to...

x86: memory leak with MSR emulation

ISSUE DESCRIPTION In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. IMPACT A memory allocation of 8 bytes is leaked each time a vcpu is destroyed. A malicious...

SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2018:0007-1) (Spectre)

This update for qemu fixes the following issues: A new feature was added : - Support EPYC vCPU type bsc1052825 fate324038 Also a mitigation for a security problem has been applied : - CVE-2017-5715: QEMU was updated to allow passing through new MSR and CPUID flags from the host VM to the CPU, to...

SUSE-SU-2018:0007-1 Security update for qemu

This update for qemu fixes the following issues: A new feature was added: - Support EPYC vCPU type bsc1052825 fate324038 Also a mitigation for a security problem has been applied: - CVE-2017-5715: QEMU was updated to allow passing through new MSR and CPUID flags from the host VM to the CPU, to...

How to Update MCS created Machine Catalog to modify vCPU, RAM.

Due to performance issues the vCPU,RAM need to be increased. This can be done by power shell...

CVE-2017-10916

The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions MPX and Protection Key PKU features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220...

CVE-2017-10923

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service hypervisor crash, aka XSA-225. Mitigation On systems where the guest kernel is controlled by the host rather than guest administrator, running only kernels...

CVE-2017-10923

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service hypervisor crash, aka XSA-225...

CVE-2017-10923

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service hypervisor crash, aka XSA-225...

CVE-2017-10916

The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions MPX and Protection Key PKU features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220...