UBUNTU-CVE-2016-9818

Xen through 4.7.x allows local ARM guest OS users to cause a denial of service host crash via vectors involving an asynchronous abort while at HYP...

ALPINE-CVE-2016-9815

Xen through 4.7.x allows local ARM guest OS users to cause a denial of service host panic by sending an asynchronous abort...

UBUNTU-CVE-2016-9377

Xen 4.5.x through 4.7.x on AMD systems without the NRip feature, when emulating instructions that generate software interrupts, allows local HVM guest OS users to cause a denial of service guest crash by leveraging IDT entry miscalculation...

ALPINE-CVE-2016-9378

Xen 4.5.x through 4.7.x on AMD systems without the NRip feature, when emulating instructions that generate software interrupts, allows local HVM guest OS users to cause a denial of service guest crash by leveraging an incorrect choice for software interrupt delivery...

cirrus_bitblt_cputovideo does not check if memory region is safe

ISSUE DESCRIPTION In CIRRUSBLTMODEMEMSYSSRC mode the bitblit copy routine cirrusbitbltcputovideo fails to check wethehr the specified memory region is safe. IMPACT A malicious guest administrator can cause an out of bounds memory write, very likely exploitable as a privilege escalation. VULNERABL...

CVE-2016-9637

The 1 ioportread and 2 ioportwrite functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access...

oob access in cirrus bitblt copy

ISSUE DESCRIPTION When doing bitblt copy backwards, qemu should negate the blit width. This avoids an oob access before the start of video memory. IMPACT A malicious guest administrator can cause an out of bounds memory access, leading to information disclosure or privilege escalation. VULNERABLE...

Xen Intel VMX hvmemul_vmfunc() NULL Pointer Dereference DoS (XSA-203)

According to its self-reported version number, the Xen hypervisor installed on the remote host is missing a security update. It is, therefore, affected by a NULL pointer dereference flaw due to a failure to utilize necessary NULL checks before doing indirect function calls through the hvmemulvmfu...

DEBIAN-CVE-2016-10024

Xen through 4.8.x allows local x86 PV guest OS kernel administrators to cause a denial of service host hang or crash by modifying the instruction stream asynchronously while performing certain kernel operations...

DEBIAN-CVE-2016-10013

Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation...

ALPINE-CVE-2016-10024

Xen through 4.8.x allows local x86 PV guest OS kernel administrators to cause a denial of service host hang or crash by modifying the instruction stream asynchronously while performing certain kernel operations...

ALPINE-CVE-2016-9379

The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file...

UBUNTU-CVE-2016-9386

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values...

UBUNTU-CVE-2016-9385

The x86 segment base write emulation functionality in Xen 4.4.x through 4.7.x allows local x86 PV guest OS administrators to cause a denial of service host crash by leveraging lack of canonical address checks...

DEBIAN-CVE-2016-1922

QEMU aka Quick Emulator built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'currentcpu' remains null, which leads to the null pointer dereference. A user or...

PT-2016-3002 · Qemu +3 · Qemu +3

Name of the Vulnerable Software and Affected Versions: QEMU affected versions not specified Description: The issue is related to a memory leak in the v9fs device unrealize common function, which can be exploited by local privileged guest OS users to cause a denial of service. This can lead to hos...

Fedora 25 : xen (2016-92e3ea2d1b)

two security flaws 1406840 x86 PV guests may be able to mask interrupts XSA-202, CVE-2016-10024 x86: missing NULL pointer check in VMFUNC emulation XSA-203, CVE-2016-10025 x86: Mishandling of SYSCALL singlestep during emulation XSA-204, CVE-2016-10013 1406260 Note that Tenable Network Security ha...

PT-2016-7786 · Linux +5 · Linux Kernel +5

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 4.10 Description: The issue mismanages the BP and OF exceptions in the Linux kernel, allowing guest OS users to cause a denial of service by declining to handle an exception thrown by an L2 guest. Recommendation...

SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:3208-1)

This update for xen fixes the following issues : - A Mishandling of SYSCALL singlestep during emulation which could have lead to privilege escalation. XSA-204, bsc1016340, CVE-2016-10013 - CMPXCHG8B emulation failed to ignore operand size override which could have lead to information disclosure...

x86: missing NULL pointer check in VMFUNC emulation

ISSUE DESCRIPTION When support for the Intel VMX VMFUNC leaf 0 was added, a new optional function pointer hvmemulvmfunc was added to the hvmemulateops table. As is intended, that new function pointer is NULL on non-VMX hardware, including AMD SVM hardware. However at a call site, the necessary NU...