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kernel, perf, python security update

Description

**CentOS Errata and Security Advisory** CESA-2017:0892 The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important) * A flaw was found in the Linux kernel's implementation of seq_file where a local attacker could manipulate memory in the put() function pointer. This could lead to memory corruption and possible privileged escalation. (CVE-2016-7910, Moderate) Red Hat would like to thank Alexander Popov for reporting CVE-2017-2636. Bug Fix(es): * Previously, Chelsio firmware included an incorrectly-formatted firmware bin file. As a consequence, the firmware could not be flashed. This update provides a firmware bin file that is formatted correctly. As a result, Chelsio firmware can now be flashed successfully. (BZ#1433865) * When multiple simultaneous processes attempted to read from the /proc/stat file, spinlock overhead was generated on Non-Uniform Memory Access (NUMA) systems. Consequently, a large amount of CPU was consumed. With this update, the underlying source code has been fixed to avoid taking spinlock when the interrupt line does not exist. As a result, the spinlock overhead is now generated less often, and multiple simultaneous processes can now read /proc/stat without consuming a large amount of CPU. (BZ#1428106) **Merged security bulletin from advisories:** https://lists.centos.org/pipermail/centos-announce/2017-April/084520.html **Affected packages:** kernel kernel-abi-whitelists kernel-debug kernel-debug-devel kernel-devel kernel-doc kernel-firmware kernel-headers perf python-perf **Upstream details at:** https://access.redhat.com/errata/RHSA-2017:0892


Affected Package


OS OS Version Package Name Package Version
CentOS 6 kernel 2.6.32-696.1.1.el6
CentOS 6 kernel-abi-whitelists 2.6.32-696.1.1.el6
CentOS 6 kernel-debug 2.6.32-696.1.1.el6
CentOS 6 kernel-debug-devel 2.6.32-696.1.1.el6
CentOS 6 kernel-devel 2.6.32-696.1.1.el6
CentOS 6 kernel-doc 2.6.32-696.1.1.el6
CentOS 6 kernel-firmware 2.6.32-696.1.1.el6
CentOS 6 kernel-headers 2.6.32-696.1.1.el6
CentOS 6 perf 2.6.32-696.1.1.el6
CentOS 6 python-perf 2.6.32-696.1.1.el6
CentOS 6 kernel 2.6.32-696.1.1.el6
CentOS 6 kernel-abi-whitelists 2.6.32-696.1.1.el6
CentOS 6 kernel-debug 2.6.32-696.1.1.el6
CentOS 6 kernel-debug-devel 2.6.32-696.1.1.el6
CentOS 6 kernel-debug-devel 2.6.32-696.1.1.el6
CentOS 6 kernel-devel 2.6.32-696.1.1.el6
CentOS 6 kernel-doc 2.6.32-696.1.1.el6
CentOS 6 kernel-firmware 2.6.32-696.1.1.el6
CentOS 6 kernel-headers 2.6.32-696.1.1.el6
CentOS 6 perf 2.6.32-696.1.1.el6
CentOS 6 python-perf 2.6.32-696.1.1.el6
CentOS 6 kernel 2.6.32-696.1.1.el6

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