DEBIAN-CVE-2020-2732

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest...

CVE-2020-2732

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest...

CVE-2020-2732

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest...

CVE-2019-7222

An information leakage issue was found in the way Linux kernel's KVM hypervisor handled page fault exceptions while emulating instructions like VMXON, VMCLEAR, VMPTRLD, and VMWRITE with memory address as an operand. It occurs if the operand is a mmio address, as the returned exception object hold...

CVE-2018-1087

A flaw was found in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first...

CVE-2020-8834

A flaw was found in the way the KVM hypervisor on the Power8 processor stores the r1 register state in the 'HSTATEHOSTR1' field on the Linux kernel stack. This flaw occurs while handling hypercalls in Transactional Memory TM suspend mode in the kvmppcsavetm and kvmppcrestoretm routines, leading t...

CVE-2019-3016

A flaw was found in the way Linux kernel's KVM hypervisor handled deferred TLB flush requests from guest. A race condition may occur between the guest issuing a deferred TLB flush request to KVM, and then KVM handling and acknowledging it. This may result in invalid address translations from TLB...

CVE-2018-16882

A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested=1 virtualization is enabled. In nestedgetvmcs12pages, in case of an error while processing posted interrupt address, it unmaps the 'pidescpage' without resetting 'pidesc' descript...

MGASA-2020-0158 Updated kernel-linus packages fix security vulnerabilities

This update is based on upstream 5.5.15 and fixes at least the following security vulnerabilities: In the Linux kernel 5.4.0-rc2, there is a use-after-free read in the blkaddtrace function in kernel/trace/blktrace.c which is used to fill out a blkiotrace structure and place it in a per-cpu...

EulerOS Virtualization for ARM 64 3.0.6.0 : kernel (EulerOS-SA-2020-1368)

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - In the Linux kernel 5.0.21, mounting a crafted ext4 filesystem image, performing some operations, and unmounting can...

EulerOS Virtualization for ARM 64 3.0.6.0 : kernel (EulerOS-SA-2020-1342)

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - A heap-based buffer overflow was discovered in the Linux kernel's Marvell WiFi chip driver. The flaw could occur when...

USN-4302-1: Linux kernel vulnerabilities

Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested level 2 guest access the resources of a parent level 1 guest in certain situations. An attacker could use this to expose sensitive information. CVE-2020-2732 Gregory Herrero discovere...

Important: kernel

Issue Overview: A stack buffer overflow issue was found in the getrawsocket routine of the Host kernel accelerator for virtio net vhost-net driver. It could occur while doing an ictolVHOSTNETSETBACKEND call, and retrieving socket name in a kernel stack variable via getrawsocket. A user able to...

Ubuntu 16.04 LTS : Linux kernel vulnerability (USN-4303-1)

The remote Ubuntu 16.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4303-1 advisory. Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested level 2 guest access the resources of a parent...

Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4302-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4302-1 advisory. Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested level 2 guest access the...

USN-4303-1: Linux kernel vulnerability

Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested level 2 guest access the resources of a parent level 1 guest in certain situations. An attacker could use this to expose sensitive information...

USN-4303-2: Linux kernel (HWE) vulnerability

USN-4303-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement HWE kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM. Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel...

openSUSE Security Update : the Linux Kernel (openSUSE-2020-336)

The openSUSE Leap 15.1 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : - CVE-2019-14615: Insufficient control flow in certain data structures for some IntelR Processors with IntelR Processor Graphics may have allowed an unauthenticated user to...

Security update for the Linux Kernel (important)

openSUSE Security Update: Security update for the Linux Kernel Announcement ID: openSUSE-SU-2020:0336-1 Rating: important References: 1046303 1050244 1050549 1051510 1051858 1060463 1061840 1065600 1065729 1071995 1083647 1085030 1086301 1086313 1086314 1088810 1090888 1103989 1103990 1103991...

SUSE SLES12 Security Update : kernel (SUSE-SU-2020:0584-1)

The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2020-2732: Fixed an issue affecting Intel CPUs where an L2 guest may trick the L0 hypervisor into accessing sensitive L1 resources bsc1163971. CVE-2019-19338:...