Important: kernel security, bug fix, and enhancement update

Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory: Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.5 Extended Update Support.

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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members (CVE-2018-13405)
  

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):

• [Dell EMC 7.6 BUG] File system corrupting with I/O Stress on H330 PERC on AMD Systems (BZ#1698337)
  
• [RHEL7.7] Refined TSC clocksource calibration occasionally fails on some SkyLake-X servers (BZ#1719780)
  
• Poor system performance from thundering herd of kworkers competing for mddev->flush_bio ownership (BZ#1721533)
  
• fragmented packets timing out (BZ#1729412)
  
• After update to RHEL 7.6 (3.10.0-957.1.3.el7.x86_64) from 7.4, customer has experienced multiple panics in kernel at BUG at drivers/iommu/iova.c:859! (BZ#1731299)
  
• kernel build: speed up debuginfo extraction (BZ#1731463)
  

Enhancement(s):

• [Intel 7.6 FEAT] Graphics Kernel Driver v4.15 updates (BZ#1716309)

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 Server - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.5 ppc64le

Fixes

• BZ - 1599161 - CVE-2018-13405 kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members

CVEs

• CVE-2018-13405

References

• https://access.redhat.com/security/updates/classification/#important