MGASA-2014-0207

Updated kernel-linus provides upstream 3.12.18 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)

Oter fixes in this update: - switch hugepages back to madvise to fix performance regression (mga#12994) - enable Intel P-state driver (mga#13080) - fix r8169 suspend/resume issue (mga#13255)

For upstream merged fixes, read the referenced changelogs: