CVE-2015-7970

xen: Long latency populate-on-demand operation is not preemptible on x86

The p2m_pod_emergency_sweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service (CPU consumption and possibly reboot) via crafted memory contents that triggers a "time-consuming linear scan," related to Populate-on-Demand.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-7969

xen: leak of main per-domain vcpu pointer array

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) XEN_DOMCTL_max_vcpus hypercall or the xenoprofile state vcpu pointer array allocated using the (2) XENOPROF_get_buffer or (3) XENOPROF_set_passive hypercall.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-7835

xen: Uncontrolled creation of large page mappings by PV guests on x86

The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.

CVSS 2.0 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-7814

xen: Race between domain destruction and memory allocation decrease on ARM

Race condition in the relinquish_memory function in arch/arm/domain.c in Xen 4.6.x and earlier allows local domains with partial management control to cause a denial of service (host crash) via vectors involving the destruction of a domain and using XENMEM_decrease_reservation to reduce the memory of the domain.

CVSS 2.0 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-7813

xen: Various unimplemented hypercalls log without rate limiting on ARM

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of (1) HYPERVISOR_physdev_op hypercalls, which are not properly handled in the do_physdev_op function in arch/arm/physdev.c, or (2) HYPERVISOR_hvm_op hypercalls, which are not properly handled in the do_hvm_op function in arch/arm/hvm.c.

CVSS 2.0 · 2.1 Low EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-7812

xen: Host crash when preempting a multicall on ARM

The hypercall_create_continuation function in arch/arm/domain.c in Xen 4.4.x through 4.6.x allows local guest users to cause a denial of service (host crash) via a preemptible hypercall to the multicall interface.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-7311

xen: libxl fails to honour readonly flag on disks with qemu-xen (xsa-142)

libxl in Xen 4.1.x through 4.6.x does not properly handle the readonly flag on disks when using the qemu-xen device model, which allows local guest users to write to a read-only disk image.

CVSS 2.0 · 3.6 Low EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-6654

xen: printk is not rate-limited in xenmem_add_to_physmap_one

The xenmem_add_to_physmap_one function in arch/arm/mm.c in Xen 4.5.x, 4.4.x, and earlier does not limit the number of printk console messages when reporting a failure to retrieve a reference on a foreign page, which allows remote domains to cause a denial of service by leveraging permissions to map the memory of a foreign guest.

CVSS 2.0 · 2.1 Low EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-5307

virt: guest to host DoS by triggering an infinite loop in microcode via #AC exception

The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #AC (aka Alignment Check) exceptions, related to svm.c and vmx.c.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Canonical Debian Linux and 3 more

Products

Ubuntu Linux Debian Linux Linux Kernel and 6 more

CVE-2015-5166

Qemu: BlockBackend object use after free issue (XSA-139)

Use-after-free vulnerability in QEMU in Xen 4.5.x and earlier does not completely unplug emulated block devices, which allows local HVM guest users to gain privileges by unplugging a block device twice.

CVSS 2.0 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Xen

Products

Fedora Xen

CVE-2015-5165

Qemu: rtl8139 uninitialized heap memory information leakage to guest (XSA-140)

The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to read process heap memory via unspecified vectors.

CVSS 2.0 · 9.3 Critical EPSS 13.3% KEV · Not listed

Vendors

Arista Debian Fedoraproject and 4 more

Products

Eos Debian Linux Fedora and 22 more

CVE-2015-5154

qemu: ide: atapi: heap overflow during I/O buffer memory access

Heap-based buffer overflow in the IDE subsystem in QEMU, as used in Xen 4.5.x and earlier, when the container has a CDROM drive enabled, allows local guest users to execute arbitrary code on the host via unspecified ATAPI commands.

CVSS 2.0 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Qemu Redhat and 2 more

Products

Fedora Qemu Enterprise Linux and 7 more

CVE-2015-4164

xen: iret hypercall handler vulnerability (xsa-136)

The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-4163

xen: GNTTABOP_swap_grant_ref operation misbehavior (xsa-134)

GNTTABOP_swap_grant_ref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service (NULL pointer dereference) via a hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-4105

xen: guest triggerable qemu MSI-X pass-through error messages (xsa-130)

Xen 3.3.x through 4.5.x enables logging for PCI MSI-X pass-through error messages, which allows local x86 HVM guests to cause a denial of service (host disk consumption) via certain invalid operations.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-4104

xen: PCI MSI mask bits inadvertently exposed to guests (xsa-129)

Xen 3.3.x through 4.5.x does not properly restrict access to PCI MSI mask bits, which allows local x86 HVM guest users to cause a denial of service (unexpected interrupt and host crash) via unspecified vectors.

CVSS 2.0 · 7.8 High EPSS 3.4% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-4103

xen: potential unintended writes to host MSI message data field via qemu (xsa-128)

Xen 3.3.x through 4.5.x does not properly restrict write access to the host MSI message data field, which allows local x86 HVM guest administrators to cause a denial of service (host interrupt handling confusion) via vectors related to qemu and accessing spanning multiple fields.

CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen

CVE-2015-3456

qemu: fdc: out-of-bounds fifo buffer memory access

The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FD_CMD_READ_ID, (2) FD_CMD_DRIVE_SPECIFICATION_COMMAND, or other unspecified commands, aka VENOM.

CVSS 2.0 · 7.7 High EPSS 15.3% KEV · Not listed

Vendors

Qemu Redhat Xen

Products

Qemu Enterprise Linux Enterprise Virtualization and 4 more

CVE-2015-3340

xen: information leak through XEN_DOMCTL_gettscinfo (xsa132)

Xen 4.2.x through 4.5.x does not initialize certain fields, which allows certain remote service domains to obtain sensitive information from memory via a (1) XEN_DOMCTL_gettscinfo or (2) XEN_SYSCTL_getdomaininfolist request.

CVSS 2.0 · 2.9 Low EPSS < 1% KEV · Not listed

Vendors

Debian Fedoraproject Opensuse and 2 more

Products

Debian Linux Fedora Opensuse and 6 more

CVE-2015-3259

xen: xl command line config handling stack overflow (XSA-137)

Stack-based buffer overflow in the xl command line utility in Xen 4.1.x through 4.5.x allows local guest administrators to gain privileges via a long configuration argument.

CVSS 2.0 · 6.8 Medium EPSS < 1% KEV · Not listed

Vendors

Xen

Products

Xen