Issued:
2020-09-29
Updated:
2020-09-29

RHSA-2020:4062 - Important: kernel-rt security and bug fix update

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: use-after-free in sound/core/timer.c (CVE-2019-19807)

  • kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)

  • kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free (CVE-2018-20836)

  • kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454)

  • kernel: use after free due to race condition in the video driver leads to local privilege escalation (CVE-2019-9458)

Space precludes documenting all of the security fixes in this advisory. See the descriptions of the remaining security fixes in the related Knowledge Article:

https://access.redhat.com/articles/5442481

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

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

ProductVersionArch
Red Hat Enterprise Linux for Real Time7x86_64
Red Hat Enterprise Linux for Real Time for NFV7x86_64

Updated Packages

  • kernel-rt-debug-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-1160.rt56.1131.el7.noarch.rpm
  • kernel-rt-trace-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.rt56.1131.el7.src.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-debug-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-trace-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-debug-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-trace-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-1160.rt56.1131.el7.x86_64.rpm

Fixes

CVEs

References

Additional information