Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory: Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise MRG 2.5.

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#1320168)

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#1267425)

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

• MRG Realtime 2 x86_64

Fixes

• BZ - 1300257 - CVE-2016-0758 kernel: tags with indefinite length can corrupt pointers in asn1_find_indefinite_length()
• BZ - 1320168 - update the MRG 2.5.x 3.10 kernel-rt sources

CVEs

• CVE-2016-0758

References

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

MRG Realtime 2

SRPM
kernel-rt-3.10.0-327.rt56.183.el6rt.src.rpm	SHA-256: 4194463381867b0991459c83ac055293bf3da16d3f85375c2f4940aa35ff0004
x86_64
kernel-rt-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: c9968422972c2d736db1c0f96837b8d70c37990131e17edaab76a93aac78e623
kernel-rt-debug-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 7eb06739c947ee10e06839a56b22c57fa36a67731bdecdd019da09abcb800964
kernel-rt-debug-debuginfo-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: a968d33461d503e893cca6e78b5d99dd3ef6483aa10131e491818847aad51808
kernel-rt-debug-devel-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 0d5b4cdc64a2ed2c1c895ef6a75f3f052869ca6b251fb39717d97872d7db050b
kernel-rt-debuginfo-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 7d68d443666aa7d8322e72de741514ff10499204b8f62733aa31041cf0a3bb2d
kernel-rt-debuginfo-common-x86_64-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: ada4c25308b687f7cf952026e1825c1171e889a40e4dd843d03908e9237ddebb
kernel-rt-devel-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 2e6fd80137f9ea78d8fae3ebec0729bc1444c27c16a11eb0682f9f3c445e0633
kernel-rt-doc-3.10.0-327.rt56.183.el6rt.noarch.rpm	SHA-256: a9a8ea6a6c0432c7f8d7ccf5a9a9b42fa5a175c73146f5b5e300d616aaef105e
kernel-rt-firmware-3.10.0-327.rt56.183.el6rt.noarch.rpm	SHA-256: a7c35306629fe6872fd952fed78128cb90d13d8d65a33257e5e79709c3011482
kernel-rt-trace-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: d52911524b1b7c83b7f067a60cdd10530ad010c811f5106d46a25cf5e8974de2
kernel-rt-trace-debuginfo-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 549fb4bf46c1245a658606201fc0cdaa431492c97d4bb89046c6d917a7b38573
kernel-rt-trace-devel-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: a2ecbcc3973924028ab192f9997f4d8efc7b70a73955edfa3b098e1443409962
kernel-rt-vanilla-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 45cb5541eabdef87e669d13b4eb310657fd691139e480dfa82d69d517aae2a9d
kernel-rt-vanilla-debuginfo-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: ee70f01bdfa9fa43dee85d2ae4fe32963245897cfd28e6a8b0fb8db70ef9ea85
kernel-rt-vanilla-devel-3.10.0-327.rt56.183.el6rt.x86_64.rpm	SHA-256: 30ba51afd8b727032bc7f0a3ea423f6dd94cf5435250fcc6fe452173543259c3