[RHSA-2016:0450-01] Important: kernel security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security update

Advisory ID: RHSA-2016:0450-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0450.html

Issue date: 2016-03-15

CVE Names: CVE-2013-2596 CVE-2015-2151

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1. Summary:

 

Updated kernel packages that fix two security issues and two bugs are now

available for Red Hat Enterprise Linux 5.

 

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 (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64

 

3. Description:

 

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

operating system.

 

* An integer overflow flaw was found in the way the Linux kernel's Frame

Buffer device implementation mapped kernel memory to user space via the

mmap syscall. A local user able to access a frame buffer device file

(/dev/fb*) could possibly use this flaw to escalate their privileges on the

system. (CVE-2013-2596, Important)

 

* It was found that the Xen hypervisor x86 CPU emulator implementation did

not correctly handle certain instructions with segment overrides,

potentially resulting in a memory corruption. A malicious guest user could

use this flaw to read arbitrary data relating to other guests, cause a

denial of service on the host, or potentially escalate their privileges on

the host. (CVE-2015-2151, Important)

 

This update also fixes the following bugs:

 

* Previously, the CPU power of a CPU group could be zero. As a consequence,

a kernel panic occurred at "find_busiest_group+570" with do_divide_error.

The provided patch ensures that the division is only performed if the CPU

power is not zero, and the aforementioned panic no longer occurs.

(BZ#1209728)

 

* Prior to this update, a bug occurred when performing an online resize of

an ext4 file system which had been previously converted from ext3. As a

consequence, the kernel crashed. The provided patch fixes online resizing

for such file systems by limiting the blockgroup search loop for non-extent

files, and the mentioned kernel crash no longer occurs. (BZ#1301100)

 

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/):

 

1034490 - CVE-2013-2596 kernel: integer overflow in fb_mmap

1196274 - CVE-2015-2151 xen: hypervisor memory corruption due to x86 emulator flaw (xsa123)

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

kernel-2.6.18-409.el5.src.rpm

 

i386:

kernel-2.6.18-409.el5.i686.rpm

kernel-PAE-2.6.18-409.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-409.el5.i686.rpm

kernel-PAE-devel-2.6.18-409.el5.i686.rpm

kernel-debug-2.6.18-409.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-409.el5.i686.rpm

kernel-debug-devel-2.6.18-409.el5.i686.rpm

kernel-debuginfo-2.6.18-409.el5.i686.rpm

kernel-debuginfo-common-2.6.18-409.el5.i686.rpm

kernel-devel-2.6.18-409.el5.i686.rpm

kernel-headers-2.6.18-409.el5.i386.rpm

kernel-xen-2.6.18-409.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-409.el5.i686.rpm

kernel-xen-devel-2.6.18-409.el5.i686.rpm

 

noarch:

kernel-doc-2.6.18-409.el5.noarch.rpm

 

x86_64:

kernel-2.6.18-409.el5.x86_64.rpm

kernel-debug-2.6.18-409.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-409.el5.x86_64.rpm

kernel-debug-devel-2.6.18-409.el5.x86_64.rpm

kernel-debuginfo-2.6.18-409.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-409.el5.x86_64.rpm

kernel-devel-2.6.18-409.el5.x86_64.rpm

kernel-headers-2.6.18-409.el5.x86_64.rpm

kernel-xen-2.6.18-409.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-409.el5.x86_64.rpm

kernel-xen-devel-2.6.18-409.el5.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

kernel-2.6.18-409.el5.src.rpm

 

i386:

kernel-2.6.18-409.el5.i686.rpm

kernel-PAE-2.6.18-409.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-409.el5.i686.rpm

kernel-PAE-devel-2.6.18-409.el5.i686.rpm

kernel-debug-2.6.18-409.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-409.el5.i686.rpm

kernel-debug-devel-2.6.18-409.el5.i686.rpm

kernel-debuginfo-2.6.18-409.el5.i686.rpm

kernel-debuginfo-common-2.6.18-409.el5.i686.rpm

kernel-devel-2.6.18-409.el5.i686.rpm

kernel-headers-2.6.18-409.el5.i386.rpm

kernel-xen-2.6.18-409.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-409.el5.i686.rpm

kernel-xen-devel-2.6.18-409.el5.i686.rpm

 

ia64:

kernel-2.6.18-409.el5.ia64.rpm

kernel-debug-2.6.18-409.el5.ia64.rpm

kernel-debug-debuginfo-2.6.18-409.el5.ia64.rpm

kernel-debug-devel-2.6.18-409.el5.ia64.rpm

kernel-debuginfo-2.6.18-409.el5.ia64.rpm

kernel-debuginfo-common-2.6.18-409.el5.ia64.rpm

kernel-devel-2.6.18-409.el5.ia64.rpm

kernel-headers-2.6.18-409.el5.ia64.rpm

kernel-xen-2.6.18-409.el5.ia64.rpm

kernel-xen-debuginfo-2.6.18-409.el5.ia64.rpm

kernel-xen-devel-2.6.18-409.el5.ia64.rpm

 

noarch:

kernel-doc-2.6.18-409.el5.noarch.rpm

 

ppc:

kernel-2.6.18-409.el5.ppc64.rpm

kernel-debug-2.6.18-409.el5.ppc64.rpm

kernel-debug-debuginfo-2.6.18-409.el5.ppc64.rpm

kernel-debug-devel-2.6.18-409.el5.ppc64.rpm

kernel-debuginfo-2.6.18-409.el5.ppc64.rpm

kernel-debuginfo-common-2.6.18-409.el5.ppc64.rpm

kernel-devel-2.6.18-409.el5.ppc64.rpm

kernel-headers-2.6.18-409.el5.ppc.rpm

kernel-headers-2.6.18-409.el5.ppc64.rpm

kernel-kdump-2.6.18-409.el5.ppc64.rpm

kernel-kdump-debuginfo-2.6.18-409.el5.ppc64.rpm

kernel-kdump-devel-2.6.18-409.el5.ppc64.rpm

 

s390x:

kernel-2.6.18-409.el5.s390x.rpm

kernel-debug-2.6.18-409.el5.s390x.rpm

kernel-debug-debuginfo-2.6.18-409.el5.s390x.rpm

kernel-debug-devel-2.6.18-409.el5.s390x.rpm

kernel-debuginfo-2.6.18-409.el5.s390x.rpm

kernel-debuginfo-common-2.6.18-409.el5.s390x.rpm

kernel-devel-2.6.18-409.el5.s390x.rpm

kernel-headers-2.6.18-409.el5.s390x.rpm

kernel-kdump-2.6.18-409.el5.s390x.rpm

kernel-kdump-debuginfo-2.6.18-409.el5.s390x.rpm

kernel-kdump-devel-2.6.18-409.el5.s390x.rpm

 

x86_64:

kernel-2.6.18-409.el5.x86_64.rpm

kernel-debug-2.6.18-409.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-409.el5.x86_64.rpm

kernel-debug-devel-2.6.18-409.el5.x86_64.rpm

kernel-debuginfo-2.6.18-409.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-409.el5.x86_64.rpm

kernel-devel-2.6.18-409.el5.x86_64.rpm

kernel-headers-2.6.18-409.el5.x86_64.rpm

kernel-xen-2.6.18-409.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-409.el5.x86_64.rpm

kernel-xen-devel-2.6.18-409.el5.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-2013-2596

https://access.redhat.com/security/cve/CVE-2015-2151

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 2016 Red Hat, Inc.

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