Synopsis

Important: kernel-rt security, bug fix, and enhancement update

Type/Severity

Security Advisory: Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

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.

Description

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.

The following packages have been upgraded to a newer upstream version: kernel-rt (3.10.0-327.18.2). This version provides a number of bug fixes and enhancements, including:

• [scsi] bnx2fc: Fix FCP RSP residual parsing and remove explicit logouts
  
• [scsi] mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO
  
• [scsi] scsi_error: should not get sense for timeout IO in scsi error handler
  
• [scsi] Revert libiscsi: Reduce locking contention in fast path
  
• [mm] madvise: fix MADV_WILLNEED on shmem swapouts
  
• [cpufreq] intel_pstate: decrease number of "HWP enabled" messages and enable HWP per CPU
  
• [kernel] sched: Robustify topology setup
  
• [kernel] sched/fair: Disable tg load_avg/runnable_avg update for root_task_group
  
• [kernel] sched/fair: Move hot load_avg/runnable_avg into separate cacheline
  
• [ib] mlx5: Fix RC transport send queue overhead computation
  
• [fs] nfsd: fix clp->cl_revoked list deletion causing softlock in nfsd
  
• [fs] ceph: multiple updates
  

(BZ#1322033)

Security Fix(es):

• A flaw was found in the way the Linux kernel's ASN.1 DER decoder processed certain certificate files with tags of indefinite length. A local, unprivileged user could use a specially crafted X.509 certificate DER file to crash the system or, potentially, escalate their privileges on the system. (CVE-2016-0758, Important)
  

Red Hat would like to thank Philip Pettersson of Samsung for reporting this issue.

Bug Fix(es):

• The hotplug lock and the console semaphore could be acquired in an incorrect order, which could previously lead to a deadlock causing the system console to freeze. The underlying code has been adjusted to acquire the locks in the correct order, resolving the bug with the console. (BZ#1324767)

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.

Affected Products

• Red Hat Enterprise Linux for Real Time 7 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 7 x86_64

Fixes

• BZ - 1300257 - CVE-2016-0758 kernel: tags with indefinite length can corrupt pointers in asn1_find_indefinite_length()
• BZ - 1322033 - kernel-rt: update to the RHEL7.2.z batch#4 source tree

CVEs

• CVE-2016-0758

References

• http://www.redhat.com/security/updates/classification/#normal

Red Hat Enterprise Linux for Real Time 7

SRPM
kernel-rt-3.10.0-327.18.2.rt56.223.el7_2.src.rpm	SHA-256: 96605b9e7c1f80bf2528c1819bdec950f0ef2b6e792424ce71ee8c06122cd991
x86_64
kernel-rt-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 2ef611ed359ed284f80a2efbc4e06a8099ba9d5750729bbd86e09fb6e58f786a
kernel-rt-debug-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: d8924fa81456261778c98f4278f125262657b25589e35367474efb73faec4da0
kernel-rt-debug-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 26a88f1d962a8b66025d1badad2302d186c9e40483e425a0fd9d1b166fbdf01d
kernel-rt-debug-devel-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: b0d7bf8dc4ad1528779daa3df3e0e7b678c4d1b20a578496d18f4ecccc157c01
kernel-rt-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 55ac386709afe8516403279716d289a0d81688be87f48ea8bc80c9d46fbccce2
kernel-rt-debuginfo-common-x86_64-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 2f75b03dbb51bed602dae6384953853b15817c785980c991b1012b1c6a03c02b
kernel-rt-devel-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: e1e9dbeca27514c09cb9029c1e5acc19a52cbf8ef13e97d7c33558c764acc34b
kernel-rt-doc-3.10.0-327.18.2.rt56.223.el7_2.noarch.rpm	SHA-256: 8e8ec0cb57d9610cf2ae5f82c0442b53581826190b60bacdc6ba37ec096e1fa7
kernel-rt-trace-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: fcae66bd99cd860411d607297df77cb83b9f5651fccf8c2e7788d3b4c000e8f2
kernel-rt-trace-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: de9452e0dc3fe5f7ad346b878aab6a48bf1a217b4fd49361fee92101ff267f35
kernel-rt-trace-devel-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 47bd4af1c13c809b6a3c866f51e8f68664eb03ec38be6b866467219f65ce41b6

Red Hat Enterprise Linux for Real Time for NFV 7

SRPM
kernel-rt-3.10.0-327.18.2.rt56.223.el7_2.src.rpm	SHA-256: 96605b9e7c1f80bf2528c1819bdec950f0ef2b6e792424ce71ee8c06122cd991
x86_64
kernel-rt-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 2ef611ed359ed284f80a2efbc4e06a8099ba9d5750729bbd86e09fb6e58f786a
kernel-rt-debug-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: d8924fa81456261778c98f4278f125262657b25589e35367474efb73faec4da0
kernel-rt-debug-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 26a88f1d962a8b66025d1badad2302d186c9e40483e425a0fd9d1b166fbdf01d
kernel-rt-debug-devel-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: b0d7bf8dc4ad1528779daa3df3e0e7b678c4d1b20a578496d18f4ecccc157c01
kernel-rt-debug-kvm-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 3a8b6481436b2dae986cc901395960a588848ef5c6121ed520b899b90264d48c
kernel-rt-debug-kvm-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 3e63e3b92691ce4ee6a59442ca5ea8cf2446f60eaa881967159e6d079069cfca
kernel-rt-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 55ac386709afe8516403279716d289a0d81688be87f48ea8bc80c9d46fbccce2
kernel-rt-debuginfo-common-x86_64-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 2f75b03dbb51bed602dae6384953853b15817c785980c991b1012b1c6a03c02b
kernel-rt-devel-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: e1e9dbeca27514c09cb9029c1e5acc19a52cbf8ef13e97d7c33558c764acc34b
kernel-rt-doc-3.10.0-327.18.2.rt56.223.el7_2.noarch.rpm	SHA-256: 8e8ec0cb57d9610cf2ae5f82c0442b53581826190b60bacdc6ba37ec096e1fa7
kernel-rt-kvm-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 5c75c60b611d1385d7d615d1e36b244a4453d504d39a97faa65e8a9f2b3aea97
kernel-rt-kvm-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: ec06922eaa684a77747c27e0897c3f3b3d836211a2536f5d123e12f56263939e
kernel-rt-trace-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: fcae66bd99cd860411d607297df77cb83b9f5651fccf8c2e7788d3b4c000e8f2
kernel-rt-trace-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: de9452e0dc3fe5f7ad346b878aab6a48bf1a217b4fd49361fee92101ff267f35
kernel-rt-trace-devel-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 47bd4af1c13c809b6a3c866f51e8f68664eb03ec38be6b866467219f65ce41b6
kernel-rt-trace-kvm-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: cbbdd717a2de7d220fffe2d98d19f01c75a8654147aff8c21729fb27f98f3709
kernel-rt-trace-kvm-debuginfo-3.10.0-327.18.2.rt56.223.el7_2.x86_64.rpm	SHA-256: 08fb924319798d97e99cc79d44e52b1fe4b2dbd6ad83a597295674a77a31a3c6