漏洞类别：Ubuntu
漏洞等级： 
漏洞信息
It was discovered that the AF_PACKET implementation in the Linux kernel did not properly validate certain block-size data.
漏洞危害
A local attacker could use this to cause a denial of service (system crash).
解决方案
Refer to Ubuntu advisory USN-3256-1 for affected packages and patching details, or update with your package manager.
Patch:
Following are links for downloading patches to fix the vulnerabilities:
USN-3256-1: 12.04 (Precise) on src (linux-image-virtual)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc64-smp-lts-utopic)
USN-3256-1: 16.04 (Xenial) on src (linux-image-raspi2)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-72-powerpc-e500mc)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-generic)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc64-smp)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-generic-pae)
USN-3256-1: 14.04 (Kylin) on src (linux-image-powerpc64-smp)
USN-3256-1: 12.04 (Precise) on src (linux-image-omap)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-46-powerpc-smp)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-72-generic-lpae)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-72-lowlatency)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-72-generic)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-46-powerpc-e500mc)
USN-3256-1: 14.04 (Kylin) on src (linux-image-powerpc-smp)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc-e500mc)
USN-3256-1: 14.04 (Kylin) on src (linux-image-generic)
USN-3256-1: 12.04 (Precise) on src (linux-image-highbank)
USN-3256-1: 16.04 (Xenial) on src (linux-image-aws)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-generic)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-1052-raspi2)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-lowlatency)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-lowlatency)
USN-3256-1: 16.04 (Xenial) on src (linux-image-gke)
USN-3256-1: 12.04 (Precise) on src (linux-image-powerpc-smp)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-powerpc-e500)
USN-3256-1: 12.04 (Precise) on src (linux-image-powerpc64-smp)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-powerpc-smp)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-raspi2)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-generic-lpae)
USN-3256-1: 12.04 (Precise) on src (linux-image-generic)
USN-3256-1: 14.04 (Kylin) on src (linux-image-powerpc-e500mc)
USN-3256-1: 14.04 (Kylin) on src (linux-image-lowlatency)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-1013-aws)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc64-smp-lts-wily)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-highbank)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-72-powerpc64-smp)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-powerpc-smp)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc64-smp-lts-vivid)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-powerpc64-smp)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-72-powerpc-smp)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc-smp)
USN-3256-1: 16.04 (Xenial) on src (linux-image-lowlatency)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-46-generic-lpae)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-1504-omap4)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-1010-gke)
USN-3256-1: 16.04 (Xenial) on src (linux-image-generic-lpae)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-46-lowlatency)
USN-3256-1: 16.04 (Xenial) on src (linux-image-generic)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-virtual)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-powerpc-e500mc)
USN-3256-1: 14.04 (Kylin) on src (linux-image-powerpc-e500)
USN-3256-1: 16.04 (Xenial) on src (linux-image-powerpc64-smp-lts-xenial)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-powerpc-e500mc)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-powerpc-smp)
USN-3256-1: 12.04 (Precise) on src (linux-image-omap4)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-generic)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-omap)
USN-3256-1: 14.04 (Kylin) on src (linux-image-generic-lpae)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-46-generic)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-powerpc64-smp)
USN-3256-1: 14.04 (Kylin) on src (linux-image-3.13.0-116-generic-lpae)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-1033-raspi2)
USN-3256-1: 12.04 (Precise) on src (linux-image-3.2.0-126-powerpc64-smp)
USN-3256-1: 12.04 (Precise) on src (linux-image-generic-pae)
USN-3256-1: 16.10 (Yakkety) on src (linux-image-4.8.0-46-powerpc64-emb)
USN-3256-1: 16.04 (Xenial) on src (linux-image-4.4.0-1055-snapdragon)
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