Rogue backends can cause DoS of guests via high frequency events

ISSUE DESCRIPTION Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the...

UVI-2021-1001765 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.14.9 by commit...

GSD-2021-1001765 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.14.9 by commit...

UVI-2021-1001676 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.10.70 by commit...

UVI-2021-1001616 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.150 by commit...

GSD-2021-1001616 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.150 by commit...

UVI-2021-1001573 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.209 by commit...

GSD-2021-1001573 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.209 by commit...

GSD-2021-1001547 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.249 by commit...

UVI-2021-1001520 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.9.285 by commit...

GSD-2021-1001520 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.9.285 by commit...

UVI-2021-1001502 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.4.286 by commit...

GSD-2021-1001502 xen/x86: fix PV trap handling on secondary processors

xen/x86: fix PV trap handling on secondary processors This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.4.286 by commit...

grant table v2 status pages may remain accessible after de-allocation

ISSUE DESCRIPTION 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 switched back from v2 to v1. The freeing of such...

CVE-2021-28691

Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will...

CVE-2021-28691

Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will...

CVE-2021-28691

Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will...

UVI-2021-1000825 x86/kvm: Disable all PV features on crash

x86/kvm: Disable all PV features on crash This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.10 by commit...

UVI-2021-1000821 x86/kvm: Teardown PV features on boot CPU as well

x86/kvm: Teardown PV features on boot CPU as well This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.10 by commit...

GSD-2021-1000821 x86/kvm: Teardown PV features on boot CPU as well

x86/kvm: Teardown PV features on boot CPU as well This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.10 by commit...