RHSA-2015:0727 - Security Advisory
Important: kernel-rt security and bug fix update
Security Advisory: Important
Red Hat Insights patch analysis
Identify and remediate systems affected by this advisory.
Updated kernel-rt packages that fix two security issues and several bugs
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.
The kernel-rt packages contain the Linux kernel, the core of any Linux
- It was found that the Linux kernel's Infiniband subsystem did not
properly sanitize input parameters while registering memory regions from
user space via the (u)verbs API. A local user with access to a
/dev/infiniband/uverbsX device could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-8159,
- A use-after-free flaw was found in the way the Linux kernel's SCTP
implementation handled authentication key reference counting during INIT
collisions. A remote attacker could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2015-1421,
Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat.
The kernel-rt packages have been upgraded to version 3.10.0-229.1.2, which
provides a number of bug fixes over the previous version, including:
- The kdump service could become unresponsive due to a deadlock in the
kernel call ioapic_lock.
- Attempt to make metadata changes such as creating a thin device or
snapshot thin device did not error out cleanly.
All kernel-rt users are advised to upgrade to these updated packages, which
correct these issues. The system must be rebooted for this update to take
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:
- Red Hat Enterprise Linux for Real Time 7 x86_64
- BZ - 1181166 - CVE-2014-8159 kernel: infiniband: uverbs: unprotected physical memory access
- BZ - 1196581 - CVE-2015-1421 kernel: net: slab corruption from use after free on INIT collisions
- BZ - 1203359 - kernel-rt: rebase tree to match RHEL7.1.z source tree
Red Hat Enterprise Linux for Real Time 7
The Red Hat security contact is firstname.lastname@example.org. More contact details at https://access.redhat.com/security/team/contact/.