[RHSA-2015:2552-01] Important: kernel security and bug fix update

[news 28]

-----BEGIN PGP SIGNED MESSAGE-----

Hash: SHA1

 

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

Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2015:2552-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2552.html

Issue date: 2015-12-08

CVE Names: CVE-2015-5307 CVE-2015-8104

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

 

1. Summary:

 

Updated kernel packages that fix two security issues, several bugs, and add

one enhancement are now available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security has rated this update as having Important security

impact. Common Vulnerability Scoring System (CVSS) base scores, which give

detailed severity ratings, are available for each vulnerability from the

CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

* It was found that the x86 ISA (Instruction Set Architecture) is prone to

a denial of service attack inside a virtualized environment in the form of

an infinite loop in the microcode due to the way (sequential) delivering of

benign exceptions such as #AC (alignment check exception) and #DB (debug

exception) is handled. A privileged user inside a guest could use these

flaws to create denial of service conditions on the host kernel.

(CVE-2015-5307, CVE-2015-8104, Important)

 

Red Hat would like to thank Ben Serebrin of Google Inc. for reporting the

CVE-2015-5307 issue.

 

This update also fixes the following bugs:

 

* On Intel Xeon v5 platforms, the processor frequency was always tied to

the highest possible frequency. Switching p-states on these client

platforms failed. This update sets the idle frequency, busy frequency, and

processor frequency values by determining the range and adjusting the

minimal and maximal percent limit values. Now, switching p-states on the

aforementioned client platforms proceeds successfully. (BZ#1273926)

 

* Due to a validation error of in-kernel memory-mapped I/O (MMIO) tracing,

a VM became previously unresponsive when connected to Red Hat Enterprise

Virtualization Hypervisor. The provided patch fixes this bug by dropping

the check in MMIO handler, and a VM continues running as expected.

(BZ#1275150)

 

* Due to retry-able command errors, the NVMe driver previously leaked I/O

descriptors and DMA mappings. As a consequence, the kernel could become

unresponsive during the hot-unplug operation if a driver was removed.

This update fixes the driver memory leak bug on command retries, and the

kernel no longer hangs in this situation. (BZ#1279792)

 

* The hybrid_dma_data() function was not initialized before use, which

caused an invalid memory access when hot-plugging a PCI card. As a

consequence, a kernel oops occurred. The provided patch makes sure

hybrid_dma_data() is initialized before use, and the kernel oops no longer

occurs in this situation. (BZ#1279793)

 

* When running PowerPC (PPC) KVM guests and the host was experiencing a lot

of page faults, for example because it was running low on memory, the host

sometimes triggered an incorrect kind of interrupt in the guest: a data

storage exception instead of a data segment exception. This caused a kernel

panic of the PPC KVM guest. With this update, the host kernel synthesizes a

segment fault if the corresponding Segment Lookaside Buffer (SLB) lookup

fails, which prevents the kernel panic from occurring. (BZ#1281423)

 

* The kernel accessed an incorrect area of the khugepaged process causing

Logical Partitioning (LPAR) to become unresponsive, and an oops occurred in

medlp5. The backported upstream patch prevents an LPAR hang, and the oops

no longer occurs. (BZ#1281424)

 

* When the sctp module was loaded and a route to an association endpoint

was removed after receiving an Out-of-The-Blue (OOTB) chunk but before

incrementing the "dropped because of missing route" SNMP statistic, a Null

Pointer Dereference kernel panic previously occurred. This update fixes the

race condition between OOTB response and route removal. (BZ#1281426)

 

* The cpuscaling test of the certification test suite previously failed due

to a rounding bug in the intel-pstate driver. This bug has been fixed and

the cpuscaling test now passes. (BZ#1281491)

 

All kernel users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues. The system must be

rebooted for this update to take effect.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

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

 

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

 

1277172 - CVE-2015-5307 virt: guest to host DoS by triggering an infinite loop in microcode via #AC exception

1278496 - CVE-2015-8104 virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

kernel-3.10.0-327.3.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.3.1.el7.noarch.rpm

kernel-doc-3.10.0-327.3.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-headers-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.3.1.el7.x86_64.rpm

perf-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Client Optional (v. 7):

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

kernel-3.10.0-327.3.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.3.1.el7.noarch.rpm

kernel-doc-3.10.0-327.3.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-headers-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.3.1.el7.x86_64.rpm

perf-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

kernel-3.10.0-327.3.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.3.1.el7.noarch.rpm

kernel-doc-3.10.0-327.3.1.el7.noarch.rpm

 

ppc64:

kernel-3.10.0-327.3.1.el7.ppc64.rpm

kernel-bootwrapper-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debug-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-327.3.1.el7.ppc64.rpm

kernel-devel-3.10.0-327.3.1.el7.ppc64.rpm

kernel-headers-3.10.0-327.3.1.el7.ppc64.rpm

kernel-tools-3.10.0-327.3.1.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

kernel-tools-libs-3.10.0-327.3.1.el7.ppc64.rpm

perf-3.10.0-327.3.1.el7.ppc64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

python-perf-3.10.0-327.3.1.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

 

ppc64le:

kernel-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-bootwrapper-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debug-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-devel-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-headers-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-tools-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-tools-libs-3.10.0-327.3.1.el7.ppc64le.rpm

perf-3.10.0-327.3.1.el7.ppc64le.rpm

perf-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

python-perf-3.10.0-327.3.1.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

 

s390x:

kernel-3.10.0-327.3.1.el7.s390x.rpm

kernel-debug-3.10.0-327.3.1.el7.s390x.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.s390x.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.s390x.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.s390x.rpm

kernel-debuginfo-common-s390x-3.10.0-327.3.1.el7.s390x.rpm

kernel-devel-3.10.0-327.3.1.el7.s390x.rpm

kernel-headers-3.10.0-327.3.1.el7.s390x.rpm

kernel-kdump-3.10.0-327.3.1.el7.s390x.rpm

kernel-kdump-debuginfo-3.10.0-327.3.1.el7.s390x.rpm

kernel-kdump-devel-3.10.0-327.3.1.el7.s390x.rpm

perf-3.10.0-327.3.1.el7.s390x.rpm

perf-debuginfo-3.10.0-327.3.1.el7.s390x.rpm

python-perf-3.10.0-327.3.1.el7.s390x.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.s390x.rpm

 

x86_64:

kernel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-headers-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.3.1.el7.x86_64.rpm

perf-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 7):

 

ppc64:

kernel-debug-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-327.3.1.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

kernel-tools-libs-devel-3.10.0-327.3.1.el7.ppc64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.ppc64.rpm

 

ppc64le:

kernel-debug-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

kernel-tools-libs-devel-3.10.0-327.3.1.el7.ppc64le.rpm

perf-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.ppc64le.rpm

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

kernel-3.10.0-327.3.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.3.1.el7.noarch.rpm

kernel-doc-3.10.0-327.3.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-devel-3.10.0-327.3.1.el7.x86_64.rpm

kernel-headers-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.3.1.el7.x86_64.rpm

perf-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 7):

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.3.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.3.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.3.1.el7.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-2015-5307

https://access.redhat.com/security/cve/CVE-2015-8104

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 2015 Red Hat, Inc.

-----BEGIN PGP SIGNATURE-----

Version: GnuPG v1

 

iD8DBQFWZubYXlSAg2UNWIIRAsvDAJ46kkXWcTnnN5EtbqyO0fc2+uZZawCeNnnr

2T4VNHyutcGOZycd46ObXOk=

=v6PE

-----END PGP SIGNATURE-----

 

 

--