USN-5070-1 linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi 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...

Moderate: Red Hat Security Advisory: Red Hat Virtualization Host security and bug fix update [ovirt-4.4.8]

An update for cockpit-ovirt, ovirt-host, ovirt-hosted-engine-ha, ovirt-hosted-engine-setup, and vdsm is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring...

Ubuntu 16.04 ESM : Linux kernel vulnerability (USN-5062-1)

The remote Ubuntu 16.04 ESM host has a package installed that is affected by a vulnerability as referenced in the USN-5062-1 advisory. 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...

kernel: powerpc: KVM guest OS users can cause host OS memory corruption

A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtasargs.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability...

kernel: powerpc: KVM guest OS users can cause host OS memory corruption

A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtasargs.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability...

The vulnerability of the TACACS authentication system in Cisco Enterprise NFV Infrastructure Software (NFVIS) allows a perpetrator to increase their privileges.

The vulnerability of the TACACS authentication system in Cisco Enterprise NFV Infrastructure Software NFVIS relates to bypassing authentication using an alternative username. Exploiting this vulnerability allows a malicious actor to elevate their privileges to the level of an administrator...

OESA-2021-1331 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: arch/x86/kvm/mmu/pagingtmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault.CVE-2021-38198...

kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VMIO|VMPFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write random pages of...

hw: vt-d related privilege escalation

A flaw was found in Intel® VT-d products. Entries from the context cache on some types of context cache invalidations may not be properly invalidated which may allow an authenticated user to potentially enable escalation of privilege via local access. The highest threat from this vulnerability is...

hw: vt-d related privilege escalation

A flaw was found in Intel® VT-d products. Entries from the context cache on some types of context cache invalidations may not be properly invalidated which may allow an authenticated user to potentially enable escalation of privilege via local access. The highest threat from this vulnerability is...

hw: vt-d related privilege escalation

A flaw was found in Intel® VT-d products. Entries from the context cache on some types of context cache invalidations may not be properly invalidated which may allow an authenticated user to potentially enable escalation of privilege via local access. The highest threat from this vulnerability is...

hw: vt-d related privilege escalation

A flaw was found in Intel® VT-d products. Entries from the context cache on some types of context cache invalidations may not be properly invalidated which may allow an authenticated user to potentially enable escalation of privilege via local access. The highest threat from this vulnerability is...

ALPINE-CVE-2021-28696

IOMMU page mapping issues on x86 This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresse...

ALPINE-CVE-2021-28694

IOMMU page mapping issues on x86 This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresse...

DEBIAN-CVE-2021-28694

IOMMU page mapping issues on x86 This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresse...

UBUNTU-CVE-2021-28694

IOMMU page mapping issues on x86 This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresse...

UBUNTU-CVE-2021-28695

IOMMU page mapping issues on x86 This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresse...

CVE-2021-28697

grant table v2 status pages may remain accessible after de-allocation Guest get permitted access to certain Xen-owned pages of memory. The majority of such pages remain allocated / associated with a guest for its entire lifetime. Grant table v2 status pages, however, get de-allocated when a guest...

Moderate: Red Hat Security Advisory: OpenShift Virtualization 4.8.1 Images security and bug fix update

Red Hat OpenShift Virtualization release 4.8.1 is now available with updates to packages and images that fix several bugs and add enhancements. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which give...

hw: vt-d related privilege escalation

A flaw was found in Intel® VT-d products. Entries from the context cache on some types of context cache invalidations may not be properly invalidated which may allow an authenticated user to potentially enable escalation of privilege via local access. The highest threat from this vulnerability is...