RHSA-2018:1826: Important: kernel security, bug fix, and enhancement update

Published Jun 12, 2018
·
Updated

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, PowerPC) Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.Bug Fix(es) and Enhancement(s):These updated kernel packages include also numerous bug fixes and enhancements. Space precludes documenting all of the bug fixes and enhancements in this advisory. See the descriptions in the related Knowledge Article:https://access.redhat.com/articles/3483021

Affected Software

32 affected componentsFixes available
redhat/kernel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-abi-whitelists<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debug<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debug-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debug-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debug-devel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debug-devel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debuginfo-common-i686<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-devel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-doc<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-firmware<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-headers<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/perf<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/perf-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/perf-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/python-perf<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/python-perf-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/python-perf-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debug<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-devel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-headers<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/perf<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/python-perf<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debuginfo-common-s390x<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-kdump<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-kdump-debuginfo<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-kdump-devel<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-bootwrapper<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6
redhat/kernel-debuginfo-common-ppc64<2.6.32-573.59.1.el6
2.6.32-573.59.1.el6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  2. Upgrade

    Upgrade redhat/kernel-abi-whitelists to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  3. Upgrade

    Upgrade redhat/kernel-debug to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  4. Upgrade

    Upgrade redhat/kernel-debug-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  5. Upgrade

    Upgrade redhat/kernel-debug-devel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  6. Upgrade

    Upgrade redhat/kernel-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  7. Upgrade

    Upgrade redhat/kernel-debuginfo-common-i686 to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  8. Upgrade

    Upgrade redhat/kernel-devel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  9. Upgrade

    Upgrade redhat/kernel-doc to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  10. Upgrade

    Upgrade redhat/kernel-firmware to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  11. Upgrade

    Upgrade redhat/kernel-headers to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  12. Upgrade

    Upgrade redhat/perf to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  13. Upgrade

    Upgrade redhat/perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  14. Upgrade

    Upgrade redhat/python-perf to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  15. Upgrade

    Upgrade redhat/python-perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  16. Upgrade

    Upgrade redhat/kernel-debuginfo-common-s390x to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  17. Upgrade

    Upgrade redhat/kernel-kdump to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  18. Upgrade

    Upgrade redhat/kernel-kdump-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  19. Upgrade

    Upgrade redhat/kernel-kdump-devel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  20. Upgrade

    Upgrade redhat/kernel-bootwrapper to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  21. Upgrade

    Upgrade redhat/kernel-debuginfo-common-ppc64 to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  22. Upgrade

    Upgrade kernel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  23. Upgrade

    Upgrade kernel-abi-whitelists to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  24. Upgrade

    Upgrade kernel-debug to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  25. Upgrade

    Upgrade kernel-debug-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  26. Upgrade

    Upgrade kernel-debug-devel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  27. Upgrade

    Upgrade kernel-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  28. Upgrade

    Upgrade kernel-debuginfo-common to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  29. Upgrade

    Upgrade kernel-devel to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  30. Upgrade

    Upgrade kernel-doc to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  31. Upgrade

    Upgrade kernel-firmware to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  32. Upgrade

    Upgrade kernel-headers to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  33. Upgrade

    Upgrade perf to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  34. Upgrade

    Upgrade perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  35. Upgrade

    Upgrade python-perf to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6
  36. Upgrade

    Upgrade python-perf-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.32-573.59.1.el6

Event History

Jul 26, 2026
Advisory Published
via Red Hat·11:43 AM
Data Sourced
via Red Hat·11:43 AM
RemedyDescriptionAffected Software
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Frequently Asked Questions

1

What is the severity of RHSA-2018:1826?

The severity of RHSA-2018:1826 is classified as important.

2

How do I fix RHSA-2018:1826?

To fix RHSA-2018:1826, update your kernel to version 2.6.32-573.59.1.el6 or newer.

3

What types of kernel packages are affected by RHSA-2018:1826?

RHSA-2018:1826 affects various packages including kernel, kernel-debug, kernel-devel, and kernel-abi-whitelists.

4

Is RHSA-2018:1826 related to speculative execution vulnerabilities?

Yes, RHSA-2018:1826 addresses a vulnerability linked to the speculative execution of Load & Store instructions.

5

What operating systems are affected by RHSA-2018:1826?

RHSA-2018:1826 affects Red Hat Enterprise Linux 6 systems running the vulnerable kernel version.

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