Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor to access sensitive L1 resources

A flaw was found in the way KVM hypervisor handled instruction emulation for the L2 guest when nested=1 virtualization is enabled. In the instruction emulation, the L2 guest could trick the L0 hypervisor into accessing sensitive bits of the L1 hypervisor. An L2 guest could use this flaw to...

Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor to access sensitive L1 resources

A flaw was found in the way KVM hypervisor handled instruction emulation for the L2 guest when nested=1 virtualization is enabled. In the instruction emulation, the L2 guest could trick the L0 hypervisor into accessing sensitive bits of the L1 hypervisor. An L2 guest could use this flaw to...

kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c

An out of bounds OOB memory access flaw was found in i2csmbusxferemulated in drivers/i2c/i2c-core-smbus.c in I2C subsystem. A read request for length data-block0 greater than 'I2CSMBUSBLOCKMAX + 1' may cause underlying I2C driver write out of array's boundary. This could allow a local attacker wi...

qemu security update

CentOS Errata and Security Advisory CESA-2020:1403 An update for qemu-kvm is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severit...

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...

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...

Integer overflow

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...

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...

CVE-2020-11869

CVE-2020-11869 : In QEMU versions 4.0.1–4.2.0, an integer overflow in ATI VGA emulation can crash the QEMU process (DoS) due to a flaw in ati_2d_blt() when handling MMIO writes via the ati_mm_write() callback in hw/display/ati-2d.c. The vulnerability is triggered through the ATI VGA display path ...

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...

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...

Medium: kernel

Issue Overview: A stack buffer overflow issue was found in the getrawsocket routine of the Host kernel accelerator for virtio net vhost-net driver. It could occur while doing an ictolVHOSTNETSETBACKEND call, and retrieving socket name in a kernel stack variable via getrawsocket. A user able to...

The vulnerability of the ide_dma_cb() function in QEMU’s hardware emulation software lies in its insufficient checking of unusual or exceptional states. This allows a malicious actor to trigger a service failure.

The vulnerability of the idedmacb function in the hardware emulation for various QEMU platforms is related to a bug in the host system, triggered through the special SCSIIOCTLSENDCOMMAND. This bug requires that the size of successfully transferred DMA operations be a multiple of 512 equal to the...

The vulnerability of the tcp_emu function in software emulation for hardware devices on various platforms, related to writing beyond the buffer boundaries of memory, allows attackers to access confidential data, compromise its integrity, and cause service failures.

The vulnerability of the tcpemu function in software for emulating hardware on various QEMU platforms is related to a memory management error. Exploiting this vulnerability can allow an attacker to gain access to confidential data, compromise its integrity, and cause service failures...

Denial Of Service (DoS)

kernel is vulnerable to denial of service. A local guest user is able to crash the application as the cpuid instruction emulation when exiting the VM are not properly handled...

Denial Of Service (DoS)

kvm is vulnerable to denial of service DoS. The vulnerability exists as a NULL pointer dereference flaw was found when the host system had a processor with the Intel VT-x extension enabled. A privileged guest user could use this flaw to trick the host into emulating a certain instruction...

Privilege Escalation

The kernel is vulnerable to privilege escalation. A flaw in the IA32 system call emulation provided in 64-bit Linux kernels could allow a local user to escalate their privileges...

Privilege Escalation

kernel is vulnerable to privilege escalation. The vulnerability exists as a flaw was found in the Xen PAL emulation on Intel 64 platforms. A guest Hardware-assisted virtual machine HVM could read the arbitrary physical memory of the host system, which could make information available to...

CVE-2020-2732

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest...

DEBIAN-CVE-2020-2732

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest...