Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Register MSR access with nested=1 virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash th...

[SECURITY] Fedora 29 Update: qemu-3.0.1-4.fc29

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

CVE-2019-3887: Incorrect Authorization

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister MSR access with nested=1 virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash t...

CVE-2019-3887

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister MSR access with nested=1 virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash t...

CVE-2019-3887

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister MSR access with nested=1 virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash t...

[SECURITY] Fedora 29 Update: qemu-3.0.0-4.fc29

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

Linux kernel KVM hypervisor memory misreference vulnerability

Linux kernel is the kernel used by the operating system Linux released by the Linux Foundation in the U.S. KVM hypervisor is one of the kernel-based virtual machines. A memory misreference vulnerability exists in the KVM hypervisor in the Linux kernel. An attacker could exploit this vulnerability...

[SECURITY] Fedora 29 Update: qemu-3.0.0-2.fc29

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

[SECURITY] Fedora 28 Update: qemu-2.11.2-2.fc28

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

[SECURITY] Fedora 27 Update: qemu-2.10.2-1.fc27

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

[SECURITY] Fedora 27 Update: qemu-2.10.1-1.fc27

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

Mystery Company Offers $250,000 Bounty for VM Escape Vulnerabilities

An unnamed company will start an eight-week, invite-only bug bounty program in September that offers a $250,000 payout for virtual-machine escape vulnerabilities tied to an unreleased product. Bugcrowd announced the program today, and said the high-priced bounty is the largest advertised bounty o...

VirtualBox Unprivilege Host User To Host Kernel Privilege Escalation

VirtualBox: unprivileged host user - host kernel privesc via ALSA config CVE-2017-3576 This is another way to escalate from an unprivileged userspace process into the VirtualBox process, which has an open file descriptor to the privileged device /dev/vboxdrv and can use that to compromise the hos...

Virtuozzo 7 : readykernel-patch (VZA-2017-010)

According to the version of the vzkernel package and the readykernel-patch installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities : - The tcpspliceread function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers to cause a...

[SECURITY] Fedora 23 Update: qemu-2.4.1-10.fc23

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

[SECURITY] Fedora 23 Update: qemu-2.4.1-9.fc23

QEMU is a generic and open source processor emulator which achieves a good emulation speed by using dynamic translation. QEMU has two operating modes: Full system emulation. In this mode, QEMU emulates a full system for example a PC, including a processor and various peripherials. It can be used ...

Xen has an unspecified vulnerability

Xen is an open source virtual machine monitor product developed at the University of Cambridge in the United Kingdom. A security vulnerability exists in Xen that can be exploited by an attacker to obtain sensitive information from uninitialized locations in the host OS kernel memory by not enabli...

DEBIAN-CVE-2015-8553

Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777...

UBUNTU-CVE-2015-8553

Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777...

CVE-2015-8553

Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777...