Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory: Important

Topic

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.

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: hw: Spectre SWAPGS gadget vulnerability (CVE-2019-1125)
• kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results (CVE-2019-9500)

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):

• BUG: scheduling while atomic in zswap (BZ#1737372)
• kernel-rt: update to the RHEL7.7.z batch#1 source tree (BZ#1740918)

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

• Red Hat Enterprise Linux for Real Time 7 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 7 x86_64

Fixes

• BZ - 1701224 - CVE-2019-9500 kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results
• BZ - 1724389 - CVE-2019-1125 kernel: hw: Spectre SWAPGS gadget vulnerability
• BZ - 1737372 - BUG: scheduling while atomic in zswap [rhel-7.7.z]
• BZ - 1740918 - kernel-rt: update to the RHEL7.7.z batch#1 source tree

CVEs

• CVE-2019-1125
• CVE-2019-9500

References