Ubuntu: Security Advisory (USN-5072-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG 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-only ifdescription...

Ubuntu: Security Advisory (USN-5071-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG 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-only ifdescription...

USN-5072-1: Linux kernel vulnerabilities

Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory...

USN-5072-1 linux-azure-5.8, linux-oem-5.10 vulnerabilities

Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory...

USN-5071-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities

Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory...

USN-5062-1 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerability

Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host's physical memory...

USN-5062-1: Linux kernel vulnerability

Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host's physical memory...

openSUSE 15 Security Update : xen (openSUSE-SU-2021:1236-1)

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:1236-1 advisory. - Observable response discrepancy in some IntelR Processors may allow an authorized user to potentially enable information disclosure via...

SUSE SLES12: xen / xen-doc-html / xen-libs / xen-libs-32bit / xen-tools / etc (SUSE-SU-2021:2957-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2957-1 advisory. - CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure udpbsc1187378. - CVE-2021-3595: slirp:...

SUSE SLED12: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2021:2924-1)

The remote SUSE Linux SLED12 / SLES12 / SLESSAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2924-1 advisory. Security issues fixed: - CVE-2021-28693: xen/arm: Boot modules are not scrubbed bsc1186428 - CVE-2021-28692: xen:...

SUSE SLES15 Security Update : xen (SUSE-SU-2021:2943-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2943-1 advisory. - CVE-2021-28698: long running loops in grant table handling XSA-380bsc1189378. - CVE-2021-28692: xen: inappropriate x86 IOMMU...

hw: L1D Cache Eviction Sampling

A microarchitectural timing flaw was found on some Intel processors. A corner case exists where data in-flight during the eviction process can end up in the “fill buffers” and not properly cleared by the MDS mitigations. The fill buffer contents which were expected to be blank can be inferred usi...

hw: Vector Register Data Sampling

A flaw was found in Intel processors where a local attacker is able to gain information about registers used for vector calculations by observing register states from other processes running on the system. This results in a race condition where store buffers, which were not cleared, could be read...

hw: observable timing discrepancy in some Intel Processors

Observable timing discrepancy in some IntelR Processors may allow an authenticated user to potentially enable information disclosure via local access...

hw: improper isolation of shared resources in some Intel Processors

Microcode misconfiguration in some Intel processors may cause EIBRS mitigation CVE-2017-5715 to be incomplete. As a consequence, this issue may allow an authenticated user to potentially enable information disclosure via local access...

hw: improper isolation of shared resources in some Intel Processors

Microcode misconfiguration in some Intel processors may cause EIBRS mitigation CVE-2017-5715 to be incomplete. As a consequence, this issue may allow an authenticated user to potentially enable information disclosure via local access...

Important: Red Hat Security Advisory: microcode_ctl security, bug fix and enhancement update

An update for microcodectl is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available...

hw: Vector Register Data Sampling

A flaw was found in Intel processors where a local attacker is able to gain information about registers used for vector calculations by observing register states from other processes running on the system. This results in a race condition where store buffers, which were not cleared, could be read...

hw: observable timing discrepancy in some Intel Processors

Observable timing discrepancy in some IntelR Processors may allow an authenticated user to potentially enable information disclosure via local access...

hw: L1D Cache Eviction Sampling

A microarchitectural timing flaw was found on some Intel processors. A corner case exists where data in-flight during the eviction process can end up in the “fill buffers” and not properly cleared by the MDS mitigations. The fill buffer contents which were expected to be blank can be inferred usi...