[RHSA-2017:0892-01] Important: kernel security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2017:0892-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2017:0892

Issue date: 2017-04-11

CVE Names: CVE-2016-7910 CVE-2017-2636

=====================================================================

 

1. Summary:

 

An update for kernel is now available for Red Hat Enterprise Linux 6.

 

Red Hat Product Security has rated this update as having a security impact

of Important. A Common Vulnerability Scoring System (CVSS) base score,

which gives a detailed severity rating, is available for each vulnerability

from the CVE link(s) in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop (v. 6) - i386, noarch, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

 

3. Description:

 

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)

 

4. Solution:

 

For details on how to apply this update, which includes the changes

described in this advisory, refer to:

 

https://access.redhat.com/articles/11258

 

The system must be rebooted for this update to take effect.

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1399727 - CVE-2016-7910 kernel: Use after free in seq file

1428319 - CVE-2017-2636 kernel: Race condition access to n_hdlc.tbuf causes double free in n_hdlc_release()

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

kernel-2.6.32-696.1.1.el6.src.rpm

 

i386:

kernel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-headers-2.6.32-696.1.1.el6.i686.rpm

perf-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm

kernel-doc-2.6.32-696.1.1.el6.noarch.rpm

kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm

perf-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

i386:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

kernel-2.6.32-696.1.1.el6.src.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm

kernel-doc-2.6.32-696.1.1.el6.noarch.rpm

kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm

perf-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node Optional (v. 6):

 

x86_64:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

kernel-2.6.32-696.1.1.el6.src.rpm

 

i386:

kernel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-headers-2.6.32-696.1.1.el6.i686.rpm

perf-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm

kernel-doc-2.6.32-696.1.1.el6.noarch.rpm

kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm

 

ppc64:

kernel-2.6.32-696.1.1.el6.ppc64.rpm

kernel-bootwrapper-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debug-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-696.1.1.el6.ppc64.rpm

kernel-devel-2.6.32-696.1.1.el6.ppc64.rpm

kernel-headers-2.6.32-696.1.1.el6.ppc64.rpm

perf-2.6.32-696.1.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

 

s390x:

kernel-2.6.32-696.1.1.el6.s390x.rpm

kernel-debug-2.6.32-696.1.1.el6.s390x.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-696.1.1.el6.s390x.rpm

kernel-devel-2.6.32-696.1.1.el6.s390x.rpm

kernel-headers-2.6.32-696.1.1.el6.s390x.rpm

kernel-kdump-2.6.32-696.1.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

kernel-kdump-devel-2.6.32-696.1.1.el6.s390x.rpm

perf-2.6.32-696.1.1.el6.s390x.rpm

perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

 

x86_64:

kernel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm

perf-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

i386:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

 

ppc64:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-696.1.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

python-perf-2.6.32-696.1.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.ppc64.rpm

 

s390x:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-696.1.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

python-perf-2.6.32-696.1.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.s390x.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

kernel-2.6.32-696.1.1.el6.src.rpm

 

i386:

kernel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-headers-2.6.32-696.1.1.el6.i686.rpm

perf-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-696.1.1.el6.noarch.rpm

kernel-doc-2.6.32-696.1.1.el6.noarch.rpm

kernel-firmware-2.6.32-696.1.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.i686.rpm

kernel-debug-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

kernel-devel-2.6.32-696.1.1.el6.x86_64.rpm

kernel-headers-2.6.32-696.1.1.el6.x86_64.rpm

perf-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

i386:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-696.1.1.el6.i686.rpm

perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

python-perf-2.6.32-696.1.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.i686.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-696.1.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-2.6.32-696.1.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-696.1.1.el6.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2016-7910

https://access.redhat.com/security/cve/CVE-2017-2636

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2017 Red Hat, Inc.

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