SUSE 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...

SUSE CVE-2021-28698

long running loops in grant table handling In order to properly monitor resource use, Xen maintains information on the grant mappings a domain may create to map grants offered by other domains. In the process of carrying out certain actions, Xen would iterate over all such entries, including ones...

SUSE CVE-2021-29657

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...

SUSE CVE-2022-23035

Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time...

SUSE CVE-2022-33745

insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF see XSA-273, PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / val...

SUSE CVE-2022-42317

Xenstore: guests can let run xenstored out of memory This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Malicious guests can cause xenstored to allocate vast amounts of memory, eventually resulting in a Denial of Service...

SUSE CVE-2022-42327

x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist...

CVE-2022-42330

Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" e.g. for performing a kexec the libxl based Xen toolstack will normally perform a XSRELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XSRELEASE will have...

CVE-2022-42330

Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" e.g. for performing a kexec the libxl based Xen toolstack will normally perform a XSRELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XSRELEASE will have...

CVE-2022-42330

Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" e.g. for performing a kexec the libxl based Xen toolstack will normally perform a XSRELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XSRELEASE will have...

CVE-2022-42330

Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" e.g. for performing a kexec the libxl based Xen toolstack will normally perform a XSRELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XSRELEASE will have...

Guests can cause Xenstore crash via soft reset

ISSUE DESCRIPTION When a guest issues a "Soft Reset" e.g. for performing a kexec the libxl based Xen toolstack will normally perform a XSRELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XSRELEASE will have the same impact. IMPACT A...

CVE-2021-26328

Failure to verify the mode of CPU execution at the time of SNPINIT may lead to a potential loss of memory integrity for SNP guests...

CVE-2021-26328

Failure to verify the mode of CPU execution at the time of SNPINIT may lead to a potential loss of memory integrity for SNP guests...

CVE-2021-26328

CVE-2021-26328 describes a vulnerability in AMD’s Secure Processor/AMD EPYC platform related to SNP_INIT. The issue is a failure to verify the mode of CPU execution during SNP_INIT, which may lead to a potential loss of memory integrity for SNP guests. The AMD security bulletin AMD-SB-1032 docume...

CVE-2022-42328

Guests can trigger deadlock in Linux netback driver This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packe...

CVE-2022-3643

Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an unwritten? assumption in the rest of the Linux network stack that packet...

CVE-2022-42328

Guests can trigger deadlock in Linux netback driver This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packe...

Xenstore: Cooperating guests can create arbitrary numbers of nodes (XSA-419)

Xenstore: Two malicious guests working together can create an arbitrary number of Xenstore nodes and drive xenstored into an out of memory situation. This is possible by domain A letting domain B write into domain A local Xenstore tree. Domain B can then create many nodes and reboot. The nodes...

Xenstore: Guests can crash xenstored (XSA-414)

Xenstore: a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of...