7.2 - RHSA-2019:3978

Problem Description:

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)

* kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation (CVE-2019-15239)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

* kernel-rt: update to the RHEL7.7.z batch#3 source tree (BZ#1762889)

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

1746708 - CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer 1747353 - CVE-2019-15239 kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation 1762889 - kernel-rt: update to the RHEL7.7.z batch#3 source tree