Issued:
2021-03-16
Updated:
2021-03-16

RHSA-2021:0857 - 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: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

  • kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

  • kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)

  • kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)

  • kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)

  • kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)

  • kernel: performance counters race condition use-after-free (CVE-2020-14351)

  • kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)

  • kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)

  • kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

  • kernel: increase slab leak leads to DoS (CVE-2021-20265)

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 latest RHEL7.9.z4 source tree (BZ#1917909)

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-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-trace-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.21.1.rt56.1158.el7.src.rpm
  • kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-debug-kvm-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-trace-kvm-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-1160.21.1.rt56.1158.el7.noarch.rpm
  • kernel-rt-trace-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-debug-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm

Fixes

CVEs

References

Additional information