PT-2021-28763

Name of the Vulnerable Software and Affected Versions Linux Kernel versions v5.11 through v5.12.3 Description The issue is related to the use of created vcpus instead of online vcpus to iterate over vCPUs in KVM: SVM. The actual impact and attack plausibility have not yet been proven...

PT-2021-24769

Name of the Vulnerable Software and Affected Versions Linux Kernel versions v5.11 through v5.12.3 Description The issue concerns the use of created vcpus instead of online vcpus to iterate over vCPUs in KVM: SVM. The actual impact and attack plausibility have not yet been proven. Recommendations...

PT-2021-28056

Name of the Vulnerable Software and Affected Versions No specific software or versions are mentioned in the provided description. Description The issue is related to a crash type of UNKNOWN READ. The crash state includes cpu arm exec armeb, resume all vcpus armeb, and vm start armeb. No informati...

Low: Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update

An update is now available for Red Hat Virtualization Engine 4.4. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link...

RHEL 8 : Red Hat Virtualization (RHSA-2020:5179)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:5179 advisory. The org.ovirt.engine-root is a core component of oVirt. The following packages have been upgraded to a later upstream version: engine-db-que...

Denial Of Service (DoS)

xen is vulnerable to denial of saervice. A race condition when migrating timers between x86 HVM vCPUs allows an attacker to cause a deadlock in the application which will result in a hang or application crash...

ALPINE-CVE-2020-25604

An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it...

CVE-2020-25604

An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it...

CVE-2020-25604

An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it...

CVE-2020-25604

An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it...

CVE-2020-25604

CVE-2020-25604 in Xen up to 4.14.x describes a race condition when migrating timers between x86 HVM vCPUs. The locking model can allow a second vCPU of the same guest to release a lock it did not acquire, potentially causing a hang or crash (DoS) of the hypervisor. Affected: all Xen versions on x...

CVE-2020-25604

An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it...

PT-2020-16121

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.14.x Description A race condition exists when migrating timers between x86 HVM vCPUs, potentially causing a hang or crash of the hypervisor, resulting in a Denial of Service DoS. The issue is specific to x86 systems and...

The Number of vCPUs Assigned To A Guest Causes VIFs To Go Offline

Increasing the number of vCPUs assigned to a VM will reduce the number of available. For instance 10 vCPUs will have 7 active VIFs but 12 vCPUs will only allow 6 active VIFs...

DEBIAN-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...

PT-2015-7682

Name of the Vulnerable Software and Affected Versions Xen versions 4.0 through 4.6.x Description The issue allows local guest administrators or domains with certain permissions to cause a denial of service due to memory consumption. This can be achieved through a large number of domain "teardowns...

xen-kernel -- leak of per-domain profiling-related vcpu pointer array

The Xen Project reports: A domain's xenoprofile state contains an array of per-vcpu information... This array is leaked on domain teardown. This memory leak could -- over time -- exhaust the host's memory. The following parties can mount a denial of service attack affecting the whole system: A...

SUSE SLED11 / SLES11 Security Update : Xen (SUSE-SU-2013:1774-1)

XEN has been updated to version 4.2.3 c/s 26170, fixing various bugs and security issues. - CVE-2013-4416: XSA-72: Fixed ocaml xenstored that mishandled oversized message replies - CVE-2013-4355: XSA-63: Fixed information leaks through I/O instruction emulation - CVE-2013-4361: XSA-66: Fixed...

Oracle Linux 7 : qemu-kvm (ELSA-2015-0349)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-0349 advisory. - Resolves: bz1169456 CVE-2014-8106 qemu-kvm: qemu: cirrus: insufficient blit region checks rhel-7.1 - Resolves: bz1163078 CVE-2014-7840 qemu-kvm: qemu...

openSUSE Security Update : xen (openSUSE-2015-129)

The XEN virtualization was updated to fix bugs and security issues : Security issues fixed: CVE-2015-0361: XSA-116: xen: xen crash due to use after free on hvm guest teardown CVE-2014-9065, CVE-2014-9066: XSA-114: xen: p2m lock starvation CVE-2014-9030: XSA-113: Guest effectable page reference le...