Issued:
2020-12-15
Updated:
2020-12-15

RHSA-2020:5441 - 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: metadata validator in XFS may cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt (CVE-2020-14385)

  • kernel: The flow_dissector feature allows device tracking (CVE-2019-18282)

  • kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned. (CVE-2020-10769)

  • kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

  • kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

  • kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

  • kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow (CVE-2020-25643)

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.z2 source tree (BZ#1873318)

  • deadlock between handle_mm_fault() and ptep_clear_flush() (BZ#1888872)

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-trace-kvm-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-devel-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-debug-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-1160.11.1.rt56.1145.el7.noarch.rpm
  • kernel-rt-debug-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-debug-kvm-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-trace-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-trace-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.11.1.rt56.1145.el7.src.rpm
  • kernel-rt-debug-devel-3.10.0-1160.11.1.rt56.1145.el7.x86_64.rpm

Fixes

CVEs

References

Additional information