Oval Definition:oval:com.redhat.rhsa:def:20181635
Revision Date:2018-05-22Version:602
Title:RHSA-2018:1635: kernel security update (Important)
Description:The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

  • An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)

    Note: This issue is present in hardware and cannot be fully fixed via software update. The updated kernel packages provide software side of the mitigation for this hardware issue. To be fully functional, up-to-date CPU microcode applied on the system is required. Please refer to References section for further information about this issue, CPU microcode requirements and the potential performance impact.

    In this update mitigations for x86-64 architecture are provided.

    Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.
  • Family:unixClass:patch
    Status:Reference(s):CVE-2018-3639
    RHSA-2018:1635-00
    RHSA-2018:1635-01
    Platform(s):Red Hat Enterprise Linux 7.4 Extended Update Support
    Product(s):
    Definition Synopsis
  • Release Information
  • Red Hat Enterprise Linux 7 Client is installed
  • OR Red Hat Enterprise Linux 7 Server is installed
  • OR Red Hat Enterprise Linux 7 Workstation is installed
  • OR Red Hat Enterprise Linux 7 ComputeNode is installed
  • AND Package Information
  • kernel is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-abi-whitelists is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-abi-whitelists is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-bootwrapper is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-bootwrapper is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-debug is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-debug is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-debug-devel is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-debug-devel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-devel is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-devel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-doc is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-doc is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-headers is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-headers is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-kdump is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-kdump is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-kdump-devel is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-kdump-devel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-tools is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-tools is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-tools-libs is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-tools-libs is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-tools-libs-devel is earlier than 0:3.10.0-693.25.7.el7
  • AND kernel-tools-libs-devel is signed with Red Hat redhatrelease2 key
  • OR
  • perf is earlier than 0:3.10.0-693.25.7.el7
  • AND perf is signed with Red Hat redhatrelease2 key
  • OR
  • python-perf is earlier than 0:3.10.0-693.25.7.el7
  • AND python-perf is signed with Red Hat redhatrelease2 key
  • BACK