Race condition

arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in...

CVE-2021-28689

x86: Speculative vulnerabilities with bare non-shim 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to...

DEBIAN-CVE-2021-28689

x86: Speculative vulnerabilities with bare non-shim 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to...

CVE-2021-28689

x86: Speculative vulnerabilities with bare non-shim 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to...

CVE-2021-28689

CVE-2021-28689 concerns the Xen hypervisor. The issue affects 32-bit PV guests running in ring 1 on x86, where 32-bit PV guest kernels were paravirtualised in the original design. The underlying cause is speculative execution side-channel risk in this ring, with Indirect Branch Restricted Specula...

CVE-2021-28689

x86: Speculative vulnerabilities with bare non-shim 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to...

RHEL 8 : spice-vdagent (RHSA-2021:1791)

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1791 advisory. The spice-vdagent packages provide a SPICE agent for Linux guests. Security Fixes: spice-vdagent: possible file transfer DoS and information...

spice-vdagent security and bug fix update

An update is available for spice-vdagent. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The spice-vdagent packages provide a SPICE agent for Linux guests...

RLSA-2021:1791 Moderate: spice-vdagent security and bug fix update

The spice-vdagent packages provide a SPICE agent for Linux guests. Security Fixes: spice-vdagent: possible file transfer DoS and information leak via activexfers hash map CVE-2020-25651 spice-vdagent: UNIX domain socket peer PID retrieved via SOPEERCRED is subject to race condition CVE-2020-25653...

ALSA-2021:1791 Moderate: spice-vdagent security and bug fix update

The spice-vdagent packages provide a SPICE agent for Linux guests. Security Fixes: spice-vdagent: possible file transfer DoS and information leak via activexfers hash map CVE-2020-25651 spice-vdagent: UNIX domain socket peer PID retrieved via SOPEERCRED is subject to race condition CVE-2020-25653...

x86: Speculative vulnerabilities with bare (non-shim) 32-bit PV guests

ISSUE DESCRIPTION 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to virtualization. In AMD64, Xen had to use a different...

Xen Inverted Conditional DoS (XSA-319)

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by an issue allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference ...

SUSE: Security Advisory (SUSE-SU-2018:1177-1)

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...

SUSE: Security Advisory (SUSE-SU-2018:1378-1)

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...

SUSE: Security Advisory (SUSE-SU-2017:2326-1)

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...

SUSE: Security Advisory (SUSE-SU-2017:2873-1)

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...

Denial Of Service (DoS)

Xen is vulnerable to Denial of Service DoS. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI-X entries that the...

[SECURITY] Fedora 33 Update: spice-vdagent-0.21.0-1.fc33

Spice agent for Linux guests offering the following features: Features: Client mouse mode no need to grab mouse by client, no mouse lag this is handled by the daemon by feeding mouse events into the kernel via uinput. This will only work if the active X-session is running a spice-vdagent process ...

Fedora: Security Advisory for spice-vdagent (FEDORA-2021-09ce0cdfac)

The remote host is missing an update for the Copyright C 2021 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...

Fedora 32 : xen (2021-16c9c40d4d)

The remote Fedora 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-16c9c40d4d advisory. - An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the...