MGASA-2014-0234

Updated kernel-tmb provides upstream 3.12.20 kernel and fixes the following security issues:

Buffer overflow in the completeemulatedmmio function in arch/x86/kvm/ x86.c in the Linux kernel before 3.13.6 allows guest OS users to execute arbitrary code on the host OS by leveraging a loop that triggers an invalid memory copy affecting certain cancelworkitem data. (CVE-2014-0049)

The getrxbufs function in drivers/vhost/net.c in the vhost-net subsystem in the Linux kernel package before 2.6.32-431.11.2 on Red Hat Enterprise Linux (RHEL) 6 does not properly handle vhostgetvq_desc errors, which allows guest OS users to cause a denial of service (host OS crash) via unspecified vectors. (CVE-2014-0055)

The cifsiovecwrite function in fs/cifs/file.c in the Linux kernel through 3.13.5 does not properly handle uncached write operations that copy fewer than the requested number of bytes, which allows local users to obtain sensitive information from kernel memory, cause a denial of service (memory corruption and system crash), or possibly gain privileges via a writev system call with a crafted pointer. (CVE-2014-0069)

drivers/vhost/net.c in the Linux kernel before 3.13.10, when mergeable buffers are disabled, does not properly validate packet lengths, which allows guest OS users to cause a denial of service (memory corruption and host OS crash) or possibly gain privileges on the host OS via crafted packets, related to the handlerx and getrx_bufs functions. (CVE-2014-0077)

The ioapicdeliver function in virt/kvm/ioapic.c in the Linux kernel through 3.14.1 does not properly validate the kvmirqdeliverytoapic return value, which allows guest OS users to cause a denial of service (host OS crash) via a crafted entry in the redirection table of an I/O APIC. NOTE: the affected code was moved to the ioapicservice function before the vulnerability was announced. (CVE-2014-0155)

The nttywrite function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings. (CVE-2014-0196)

The rawcmdcopyin function in drivers/block/floppy.c in the Linux kernel through 3.14.3 does not properly handle error conditions during processing of an FDRAWCMD ioctl call, which allows local users to trigger kfree operations and gain privileges by leveraging write access to a /dev/fd device. (CVE-2014-1737)

The rawcmdcopyout function in drivers/block/floppy.c in the Linux kernel through 3.14.3 does not properly restrict access to certain pointers during processing of an FDRAWCMD ioctl call, which allows local users to obtain sensitive information from kernel heap memory by leveraging write access to a /dev/fd device. (CVE-2014-1738)

Integer overflow in the pinginitsock function in net/ipv4/ping.c in the Linux kernel through 3.14.1 allows local users to cause a denial of service (use-after-free and system crash) or possibly gain privileges via a crafted application that leverages an improperly managed reference counter. (CVE-2014-2851)

Other fixes in this update: - enable Intel P-state driver (mga#13080) - fix r8169 suspend/resume issue (mga#13255)

For upstream merged fixes, read the referenced changelogs: