Red Hat Security Advisory 2015-0869-01 - KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. It was found that KVM's Write to Model Specific Register instruction emulation would write non-canonical values passed in by the guest to certain MSRs in the host's context. A privileged guest user could use this flaw to crash the host. A race condition flaw was found in the way the Linux kernel's KVM subsystem handled PIT emulation. A guest user who has access to the PIT I/O ports could use this flaw to crash the host.
26225351ab56061b5da1791a123ec8764b904a911c83218c2500c2ca7e8fef8fRed Hat Security Advisory 2015-0284-03 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A race condition flaw was found in the way the Linux kernel's KVM subsystem handled PIT emulation. A guest user who has access to the PIT I/O ports could use this flaw to crash the host. A flaw was found in the way the Linux kernel's SCTP implementation validated INIT chunks when performing Address Configuration Change. A remote attacker could use this flaw to crash the system by sending a specially crafted SCTP packet to trigger a NULL pointer dereference on the system.
3a23bafa7ff0984a430f6377352c08ac1cc9765d54947d73d20afde3035fbc0cRed Hat Security Advisory 2015-0126-01 - The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine hypervisor. It includes everything necessary to run and manage virtual machines: a subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A heap-based buffer overflow was found in glibc's __nss_hostname_digits_dots() function, which is used by the gethostbyname() and gethostbyname2() glibc function calls. A remote attacker able to make an application call either of these functions could use this flaw to execute arbitrary code with the permissions of the user running the application.
d44426ffefcc6444f5b0e9c23919d3d7de8a73feffb3acd51ec8ab0294efb23bUbuntu Security Notice 2491-1 - Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register in the x86 architecture. A local attacker could exploit this flaw to gain administrative privileges. Lars Bull reported a race condition in the PIT (programmable interrupt timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. A local guest user with access to PIT i/o ports could exploit this flaw to cause a denial of service (crash) on the host. Various other issues were also addressed.
19a2af96124543aaa352ea18ece1dd413cfb089cee4acb7401e035e68bc63c5cUbuntu Security Notice 2462-1 - Lars Bull reported a race condition in the PIT (programmable interrupt timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. A local guest user with access to PIT i/o ports could exploit this flaw to cause a denial of service (crash) on the host. Lars Bull and Nadav Amit reported a flaw in how KVM (the Kernel Virtual Machine) handles noncanonical writes to certain MSR registers. A privileged guest user can exploit this flaw to cause a denial of service (kernel panic) on the host. Various other issues were also addressed.
0f5da1d8a858a44a37ab039d7f2dbbccb1c46685351becb6ec3a4369a865c5f3Mandriva Linux Security Advisory 2014-230 - Multiple vulnerabilities has been found and corrected in the Linux kernel. The updated packages provides a solution for these security issues.
e78db882e943ee9b4f1b7075ddaa971883bca45bf173bf02afe691b652970d70Ubuntu Security Notice 2417-1 - Nadav Amit reported that the KVM (Kernel Virtual Machine) mishandles noncanonical addresses when emulating instructions that change the rip (Instruction Pointer). A guest user with access to I/O or the MMIO can use this flaw to cause a denial of service (system crash) of the guest. A flaw was discovered with the handling of the invept instruction in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. An unprivileged guest user could exploit this flaw to cause a denial of service (system crash) on the guest. Various other issues were also addressed.
d7573d41ea8583522053f3ddf2d29337294c20d6c310ac2be612936e9cc496c9Ubuntu Security Notice 2418-1 - Nadav Amit reported that the KVM (Kernel Virtual Machine) mishandles noncanonical addresses when emulating instructions that change the rip (Instruction Pointer). A guest user with access to I/O or the MMIO can use this flaw to cause a denial of service (system crash) of the guest. A flaw was discovered with the handling of the invept instruction in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. An unprivileged guest user could exploit this flaw to cause a denial of service (system crash) on the guest. Various other issues were also addressed.
03a7978ef81c526c9834e89b46bf36cbf2997deaa68a655162066cf8d249724dRed Hat Security Advisory 2014-1843-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A race condition flaw was found in the way the Linux kernel's KVM subsystem handled PIT emulation. A guest user who has access to the PIT I/O ports could use this flaw to crash the host. A memory corruption flaw was found in the way the USB ConnectTech WhiteHEAT serial driver processed completion commands sent via USB Request Blocks buffers. An attacker with physical access to the system could use this flaw to crash the system or, potentially, escalate their privileges on the system.
e154ef355ac868abf46aa21980f64c2c9b4a1563aa31365c7ba822f982de7f79Ubuntu Security Notice 2396-1 - Nadav Amit reported that the KVM (Kernel Virtual Machine) mishandles noncanonical addresses when emulating instructions that change the rip (Instruction Pointer). A guest user with access to I/O or the MMIO can use this flaw to cause a denial of service (system crash) of the guest. A flaw was discovered with the handling of the invept instruction in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. An unprivileged guest user could exploit this flaw to cause a denial of service (system crash) on the guest. Various other issues were also addressed.
1d4a66fe54824b3a2195cd038c40ef51592bd26fe3b58cb42617177ebcf73bf4Debian Linux Security Advisory 3060-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service.
0afeb11e0e11425c8fc0a72b1d9c7150c102cb8b37d56b7e26245c2aa0015544Ubuntu Security Notice 2395-1 - Nadav Amit reported that the KVM (Kernel Virtual Machine) mishandles noncanonical addresses when emulating instructions that change the rip (Instruction Pointer). A guest user with access to I/O or the MMIO can use this flaw to cause a denial of service (system crash) of the guest. A flaw was discovered with the handling of the invept instruction in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. An unprivileged guest user could exploit this flaw to cause a denial of service (system crash) on the guest. Various other issues were also addressed.
cbe5adeb256340729c24722da0132420fbce771084cef02f02569fc8720c64cdUbuntu Security Notice 2394-1 - Nadav Amit reported that the KVM (Kernel Virtual Machine) mishandles noncanonical addresses when emulating instructions that change the rip (Instruction Pointer). A guest user with access to I/O or the MMIO can use this flaw to cause a denial of service (system crash) of the guest. A flaw was discovered with the handling of the invept instruction in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. An unprivileged guest user could exploit this flaw to cause a denial of service (system crash) on the guest. Various other issues were also addressed.
8f5ed0f7e7e1843a5ee309f342ca16e238c19172360ab78300a22bde4e498b02Red Hat Security Advisory 2014-1724-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security fixes: A race condition flaw was found in the way the Linux kernel's KVM subsystem handled PIT emulation. A guest user who has access to the PIT I/O ports could use this flaw to crash the host. A NULL pointer dereference flaw was found in the way the Linux kernel's Stream Control Transmission Protocol implementation handled simultaneous connections between the same hosts. A remote attacker could use this flaw to crash the system.
85cc9187134cdbdffbc7fa557fe4ab543e024f48904dfc8d40361c7f5f430513
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