Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario

A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable access to the devices' MMIO memory address spaces. If a user attempts to access the...

UBUNTU-CVE-2020-13754

hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address in an msi-x mmio operation...

UBUNTU-CVE-2020-12829

In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation. This flaw occurs in the COPYAREA macro while handling MMIO write operations through the sm5012denginewrite callback. A local attacker could abuse this flaw to crash the QEMU process in sm5012doperatio...

DEBIAN-CVE-2020-11869

An integer overflow was found in QEMU 4.0.1 through 4.2.0 in the way it implemented ATI VGA emulation. This flaw occurs in the ati2dblt routine in hw/display/ati-2d.c while handling MMIO write operations through the atimmwrite callback. A malicious guest could abuse this flaw to crash the QEMU...

Privilege Escalation

kernel is vulnerable to privilege escalation. The vulnerability exists when an application has a stack overflow, the stack could silently overwrite another memory mapped area instead of a segmentation fault occurring, which could cause an application to execute arbitrary code, possibly leading to...

Kernel: KVM: OOB memory access via mmio ring buffer

An out-of-bounds access issue was found in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvmcoalescedmmio' object, wherein write indices 'ring-first' and 'ring-last' value could be supplied by a host user-space...

hw: Intel GPU blitter manipulation can allow for arbitrary kernel memory write

A flaw was found in the Intel graphics hardware GPU, where a local attacker with the ability to issue commands to the GPU could inadvertently lead to memory corruption and possible privilege escalation. The attacker could use the GPU blitter to perform privilege MMIO operations, not limited to th...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

hw: Intel GPU Denial Of Service while accessing MMIO in lower power state

A flaw was found in Intel graphics hardware GPU where a local attacker with the ability to issue an ioctl could trigger a hardware level crash if MMIO registers were read while the graphics card was in a low-power state. This creates a denial of service situation and the GPU and connected display...

UBUNTU-CVE-2019-14821

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvmcoalescedmmio' object, wherein write indices 'ring-first' and 'ring-last'...

Linux kernel out-of-bounds access vulnerability (CNVD-2019-38518)

The Linux kernel is a computer operating system kernel written in C and assembly language, compliant with the POSIX standard, and distributed under the GNU General Public License. An out-of-bounds access vulnerability exists in Linux kernel 5.3 and earlier versions. The vulnerability stems from a...

PYSEC-2019-240

An issue was discovered in py-lmdb 0.97. There is a divide-by-zero error in the function mdbenvopen2 if mdbenvreadheader obtains a zero value for a certain size field. NOTE: this outcome occurs when accessing a data.mdb file supplied by an attacker...

Debian DLA-1823-1 : linux security update (SACK Panic) (SACK Slowness)

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2019-3846, CVE-2019-10126 huangwen reported multiple buffer overflows in the Marvell wifi mwifiex driver, which a local user could use to cause...

Denial Of Service (DoS)

Linux kernel is vulnerable to denial of service attacks. A race condition between direct and memory-mapped I/O which is handled with BUGON instead of an I/O failure enables local users to cause a denial of service via system crash. Affected is the functionality of file fs/xfs/xfsaops.c of the...

DEBIAN-CVE-2016-10741

In the Linux kernel before 4.9.3, fs/xfs/xfsaops.c allows local users to cause a denial of service system crash because there is a race condition between direct and memory-mapped I/O associated with a hole that is handled with BUGON instead of an I/O failure...