Synopsis

Important: kernel-rt security update

Type/Severity

Security Advisory: Important

Topic

Updated kernel-rt packages that fix one security issue are now available
for Red Hat Enterprise MRG 2.

Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

Description

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

• A use-after-free flaw was found in the way the Linux kernel's key

management subsystem handled keyring object reference counting in certain
error path of the join_session_keyring() function. A local, unprivileged
user could use this flaw to escalate their privileges on the system.
(CVE-2016-0728, Important)

Red Hat would like to thank the Perception Point research team for
reporting this issue.

All kernel-rt users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. The system must be
rebooted for this update to take effect.

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

Affected Products

• MRG Realtime 2 x86_64

Fixes

• BZ - 1297475 - CVE-2016-0728 kernel: Possible use-after-free vulnerability in keyring facility

CVEs

• CVE-2013-7421
• CVE-2014-8171
• CVE-2014-9644
• CVE-2015-2925
• CVE-2016-0728

References