Issued:

2016-11-09

Updated:

2016-11-09

RHSA-2016:2695 - Important: kernel security, bug fix, and enhancement update

Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.2 Extended Update Support.

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

Security Fix(es):

• It was found that the Linux kernel's IPv6 implementation mishandled socket options. A local attacker could abuse concurrent access to the socket options to escalate their privileges, or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call. (CVE-2016-3841, Important)

Additional Changes:

Space precludes documenting all of the bug fixes and enhancements included in this advisory. To see the complete list of bug fixes and enhancements, refer to the following KnowledgeBase article: https://access.redhat.com/articles/2754251

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

Updated Packages

• kernel-debug-debuginfo-3.10.0-327.41.3.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-tools-libs-devel-3.10.0-327.41.3.el7.ppc64.rpm
• perf-debuginfo-3.10.0-327.41.3.el7.s390x.rpm
• python-perf-3.10.0-327.41.3.el7.s390x.rpm
• kernel-tools-libs-3.10.0-327.41.3.el7.x86_64.rpm
• python-perf-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-tools-debuginfo-3.10.0-327.41.3.el7.ppc64.rpm
• perf-debuginfo-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-tools-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-debuginfo-common-ppc64-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-debuginfo-common-s390x-3.10.0-327.41.3.el7.s390x.rpm
• kernel-kdump-devel-3.10.0-327.41.3.el7.s390x.rpm
• perf-3.10.0-327.41.3.el7.s390x.rpm
• kernel-doc-3.10.0-327.41.3.el7.noarch.rpm
• python-perf-3.10.0-327.41.3.el7.ppc64.rpm
• python-perf-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-debug-debuginfo-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-3.10.0-327.41.3.el7.s390x.rpm
• kernel-tools-libs-devel-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-debug-debuginfo-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-headers-3.10.0-327.41.3.el7.s390x.rpm
• kernel-bootwrapper-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-debug-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-tools-debuginfo-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-headers-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-debuginfo-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-devel-3.10.0-327.41.3.el7.x86_64.rpm
• perf-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-debuginfo-common-x86_64-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-kdump-3.10.0-327.41.3.el7.s390x.rpm
• python-perf-debuginfo-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-debug-devel-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-tools-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-3.10.0-327.41.3.el7.src.rpm
• kernel-debuginfo-common-ppc64le-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-devel-3.10.0-327.41.3.el7.ppc64le.rpm
• python-perf-debuginfo-3.10.0-327.41.3.el7.s390x.rpm
• kernel-debug-devel-3.10.0-327.41.3.el7.s390x.rpm
• kernel-debug-debuginfo-3.10.0-327.41.3.el7.s390x.rpm
• kernel-debug-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-devel-3.10.0-327.41.3.el7.s390x.rpm
• kernel-debug-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-debuginfo-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-debug-devel-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-headers-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-debuginfo-3.10.0-327.41.3.el7.x86_64.rpm
• perf-debuginfo-3.10.0-327.41.3.el7.ppc64le.rpm
• perf-debuginfo-3.10.0-327.41.3.el7.ppc64.rpm
• perf-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-tools-libs-devel-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-debug-3.10.0-327.41.3.el7.s390x.rpm
• kernel-debug-devel-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-devel-3.10.0-327.41.3.el7.ppc64.rpm
• kernel-kdump-debuginfo-3.10.0-327.41.3.el7.s390x.rpm
• kernel-tools-libs-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-tools-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-tools-debuginfo-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-3.10.0-327.41.3.el7.x86_64.rpm
• perf-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-tools-libs-3.10.0-327.41.3.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-327.41.3.el7.x86_64.rpm
• kernel-abi-whitelists-3.10.0-327.41.3.el7.noarch.rpm
• kernel-bootwrapper-3.10.0-327.41.3.el7.ppc64le.rpm
• kernel-debuginfo-3.10.0-327.41.3.el7.s390x.rpm
• kernel-headers-3.10.0-327.41.3.el7.x86_64.rpm

Fixes

• This content is not included.BZ - 1364971

CVEs

• CVE-2016-3841

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.