Denial Of Service (DoS)

xen is vulnerable to Denial Of Service DoS. The vulnerability exists because a PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit and lock up the CPU entirely...

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:4476-1)

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4476-1 advisory. - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality. CVE-2023-20588 - arm3...

Fedora 39 : xen (2023-de338d9f37)

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-de338d9f37 advisory. xenstored: A transaction conflict can crash C Xenstored XSA-440, CVE-2023-34323 x86/AMD: missing IOMMU TLB flushing XSA-442, CVE-2023-34326 Multiple...

Fedora 37 : xen (2023-881672fdab)

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-881672fdab advisory. xenstored: A transaction conflict can crash C Xenstored XSA-440, CVE-2023-34323 x86/AMD: missing IOMMU TLB flushing XSA-442, CVE-2023-34326 Multiple...

Xen: x86/AMD: Debug Mask handling (XSA-444)

AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. - CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previo...

PT-2025-26154

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.17.0-rc3+ Description A vulnerability in the Linux kernel has been resolved, specifically in the KVM: SVM component. The issue occurs when userspace injects an interrupt with GIF=0, which can cause the kernel t...

Start from zero and scale to zero – Azure Spring Apps consumption plan

We are launching a new way to pay for Azure Spring Apps -- the consumption pricing plan. This plan is now in public preview so you can start creating and deploying apps today. This new plan is super-efficient because you can start from zero and scale to zero vCPU. You get more straightforward...

SUSE CVE-2013-2072

Buffer overflow in the Python bindings for the xcvcpusetaffinity call in Xen 4.0.x, 4.1.x, and 4.2.x allows local administrators with permissions to configure VCPU affinity to cause a denial of service memory corruption and xend toolstack crash and possibly gain privileges via a crafted cpumap...

SUSE CVE-2013-4587

Array index error in the kvmvmioctlcreatevcpu function in virt/kvm/kvmmain.c in the KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges via a large id value...

SUSE CVE-2013-5634

arch/arm/kvm/arm.c in the Linux kernel before 3.10 on the ARM platform, when KVM is used, allows host OS users to cause a denial of service NULL pointer dereference, OOPS, and host OS crash or possibly have unspecified other impact by omitting vCPU initialization before a KVMGETREGLIST ioctl call...

SUSE CVE-2015-7969

Multiple memory leaks in Xen 4.0 through 4.6.x allow local guest administrators or domains with certain permission to cause a denial of service memory consumption via a large number of "teardowns" of domains with the vcpu pointer array allocated using the 1 XENDOMCTLmaxvcpus hypercall or the...

SUSE CVE-2016-3713

The msrmtrrvalid function in arch/x86/kvm/mtrr.c in the Linux kernel before 4.6.1 supports MSR 0x2f8, which allows guest OS users to read or write to the kvmarchvcpu data structure, and consequently obtain sensitive information or cause a denial of service system crash, via a crafted ioctl call...

SUSE CVE-2018-19407

The vcpuscanioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service NULL pointer dereference and BUG via crafted system calls that reach a situation where ioapic is uninitialized...

SUSE CVE-2021-4032

A vulnerability was found in the Linux kernel's KVM subsystem in arch/x86/kvm/lapic.c kvmfreelapic when a failure allocation was detected. In this flaw the KVM subsystem may crash the kernel due to mishandling of memory errors that happens during VCPU construction, which allows an attacker with...

SUSE CVE-2022-1263

A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service...

PT-2023-2015

Name of the Vulnerable Software and Affected Versions KVM affected versions not specified Description A flaw was found in KVM that could cause an information leak when calling the KVM GET DEBUGREGS ioctl on 32-bit systems. This issue is related to uninitialized portions of the kvm debugregs...

virt-v2v security, bug fix, and enhancement update

2.0.7-6.0.1 - Replaced bugzilla.oracle.com references Orabug: 34202300 - replaced upstream references Orabug:34089586 1:2.0.7-6 - Install qemu-ga package during conversion resolves: rhbz2028764 1:2.0.7-5 - Remove LVM2 devices file during conversion resolves: rhbz2112801 - Add support for Zstandar...

An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED situations.

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A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls causing a kernel oops condition that results in a denial of service.

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CVE-2022-1263

A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service...