RedHat: RHSA-2016-0004:01 Important: kernel security update
Summary
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.
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.
Summary
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
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
Package List
Red Hat Enterprise Linux Server AUS (v. 6.4):
Source:
kernel-2.6.32-358.69.1.el6.src.rpm
i386:
kernel-2.6.32-358.69.1.el6.i686.rpm
kernel-debug-2.6.32-358.69.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-358.69.1.el6.i686.rpm
kernel-debug-devel-2.6.32-358.69.1.el6.i686.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-358.69.1.el6.i686.rpm
kernel-devel-2.6.32-358.69.1.el6.i686.rpm
kernel-headers-2.6.32-358.69.1.el6.i686.rpm
perf-2.6.32-358.69.1.el6.i686.rpm
perf-debuginfo-2.6.32-358.69.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.i686.rpm
noarch:
kernel-doc-2.6.32-358.69.1.el6.noarch.rpm
kernel-firmware-2.6.32-358.69.1.el6.noarch.rpm
ppc64:
kernel-2.6.32-358.69.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debug-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-358.69.1.el6.ppc64.rpm
kernel-devel-2.6.32-358.69.1.el6.ppc64.rpm
kernel-headers-2.6.32-358.69.1.el6.ppc64.rpm
perf-2.6.32-358.69.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
s390x:
kernel-2.6.32-358.69.1.el6.s390x.rpm
kernel-debug-2.6.32-358.69.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-358.69.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-358.69.1.el6.s390x.rpm
kernel-devel-2.6.32-358.69.1.el6.s390x.rpm
kernel-headers-2.6.32-358.69.1.el6.s390x.rpm
kernel-kdump-2.6.32-358.69.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-358.69.1.el6.s390x.rpm
perf-2.6.32-358.69.1.el6.s390x.rpm
perf-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
x86_64:
kernel-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debug-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.69.1.el6.x86_64.rpm
kernel-devel-2.6.32-358.69.1.el6.x86_64.rpm
kernel-headers-2.6.32-358.69.1.el6.x86_64.rpm
perf-2.6.32-358.69.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.4):
Source:
kernel-2.6.32-358.69.1.el6.src.rpm
i386:
kernel-debug-debuginfo-2.6.32-358.69.1.el6.i686.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-358.69.1.el6.i686.rpm
perf-debuginfo-2.6.32-358.69.1.el6.i686.rpm
python-perf-2.6.32-358.69.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.i686.rpm
ppc64:
kernel-debug-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-358.69.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
python-perf-2.6.32-358.69.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.ppc64.rpm
s390x:
kernel-debug-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-358.69.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
perf-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
python-perf-2.6.32-358.69.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-358.69.1.el6.s390x.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.69.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.69.1.el6.x86_64.rpm
python-perf-2.6.32-358.69.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.69.1.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/
Topic
Updated kernel packages that fix two security issues are now available forRed Hat Enterprise Linux 6.4 Advanced Update Support.Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server AUS (v. 6.4) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - i386, ppc64, s390x, x86_64
Bugs Fixed
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