The foolowing updates has been released for CentOS 6:

CESA-2015:0087 Important CentOS 6 kernel Security Update
CESA-2015:0100 Moderate CentOS 6 libyaml Security Update

CESA-2015:0087 Important CentOS 6 kernel Security Update

CentOS Errata and Security Advisory 2015:0087 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2015-0087.html

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
94ab95f3538737900c033c35b6cddab925c14e98c1b631fa053c8ff5f498461f kernel-2.6.32-504.8.1.el6.i686.rpm
93eec82ece225b086896b7c4f5f16af12a01f63e36584e1b6a5dbc6588a77427 kernel-abi-whitelists-2.6.32-504.8.1.el6.noarch.rpm
fab5bf5c42f887a41d74ac6f9e5ce04e88c0174da5387f96d0f6ca79502ab279 kernel-debug-2.6.32-504.8.1.el6.i686.rpm
bba6a3e485cb3bbe62601ea8b562dd68f1c40d7ab4817d9a48fa78467fe14127 kernel-debug-devel-2.6.32-504.8.1.el6.i686.rpm
feba5bf77ba9999e8ceba3cdace5011789f287b8dc4ee13cec77f21e2b597466 kernel-devel-2.6.32-504.8.1.el6.i686.rpm
6607141df93f8942c97ec62efa6a94ef3f55f4edd1ec5170127fc6df5f6e233b kernel-doc-2.6.32-504.8.1.el6.noarch.rpm
267e47d4661ebe0d792e168ac8ab8cea13392ebc941bf4fb2555e8ba9f60d491 kernel-firmware-2.6.32-504.8.1.el6.noarch.rpm
7178d1695bb488a58dd68fe6f292bfaab89c95aaa97fc2bde172de2709cdf53c kernel-headers-2.6.32-504.8.1.el6.i686.rpm
aae456c0f81e72e6e97ae801fb5a8bfd12a75eb2da64513130df451e274cc06a perf-2.6.32-504.8.1.el6.i686.rpm
4bff539dd14f78703fd024d81d7d567630a88f0669592b701c2e253f9bc3ab0b python-perf-2.6.32-504.8.1.el6.i686.rpm

x86_64:
b560c92df0e9bde6ca0c6f69422f68996631c48032b910e273cf29bae5975171 kernel-2.6.32-504.8.1.el6.x86_64.rpm
93eec82ece225b086896b7c4f5f16af12a01f63e36584e1b6a5dbc6588a77427 kernel-abi-whitelists-2.6.32-504.8.1.el6.noarch.rpm
999a188bf7b1bf4a2baa128ec5db0d7659bb032f88160d6f483ef40a60713d21 kernel-debug-2.6.32-504.8.1.el6.x86_64.rpm
40aad0abba0365c19f422db044285049dea4d023d8bcbdf48df26e6980e3f5ad kernel-debug-devel-2.6.32-504.8.1.el6.x86_64.rpm
d569c488353082fbb24b980dcb5d9c7616203bafeee21917181a8055bb02bf54 kernel-devel-2.6.32-504.8.1.el6.x86_64.rpm
6607141df93f8942c97ec62efa6a94ef3f55f4edd1ec5170127fc6df5f6e233b kernel-doc-2.6.32-504.8.1.el6.noarch.rpm
267e47d4661ebe0d792e168ac8ab8cea13392ebc941bf4fb2555e8ba9f60d491 kernel-firmware-2.6.32-504.8.1.el6.noarch.rpm
baa01c254be105e0e56b48f784813d5ec601460aa75c12b86eef96a581435b64 kernel-headers-2.6.32-504.8.1.el6.x86_64.rpm
9b9abc0f737dd4c3e15180c093395cb1a65e03c5afe94a0c8ae58852ec346284 perf-2.6.32-504.8.1.el6.x86_64.rpm
0151584f3e8196718572b4aaa4344398484cfbc6e5b4b131f0a00de99102fef6 python-perf-2.6.32-504.8.1.el6.x86_64.rpm

Source:
468cf0e8fe7ed619fe4595a5139acce5fc7b62b28b3a821c9d030a38a2e2843a kernel-2.6.32-504.8.1.el6.src.rpm

CESA-2015:0100 Moderate CentOS 6 libyaml Security Update

CentOS Errata and Security Advisory 2015:0100 Moderate

Upstream details at : https://rhn.redhat.com/errata/RHSA-2015-0100.html

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
e1cbe81e3041167ffaa66311a3aa2b1844988ec2b88f6387dc1ac2b83b2a2714 libyaml-0.1.3-4.el6_6.i686.rpm
fc34f6a55ec35a240bb8adc5ceceb270f5d16cfa90a3df78a2ed244850cbafb7 libyaml-devel-0.1.3-4.el6_6.i686.rpm

x86_64:
e1cbe81e3041167ffaa66311a3aa2b1844988ec2b88f6387dc1ac2b83b2a2714 libyaml-0.1.3-4.el6_6.i686.rpm
a2edbc9cda1d710f27d09af40f3780d9b69933e21e54d61c1c7400b03281ec2a libyaml-0.1.3-4.el6_6.x86_64.rpm
fc34f6a55ec35a240bb8adc5ceceb270f5d16cfa90a3df78a2ed244850cbafb7 libyaml-devel-0.1.3-4.el6_6.i686.rpm
41226a5117f6e34f6c1028615742fef8a3acf663efbefa11b664c010e32c45c5 libyaml-devel-0.1.3-4.el6_6.x86_64.rpm

Source:
80ee67196d7c279836002fc9d78667cacb09c26f87d441b02ddc1067fd7536b8 libyaml-0.1.3-4.el6_6.src.rpm