Issued:
2021-04-27
Updated:
2021-04-27

RHSA-2021:1379 - Important: kernel-alt security and bug fix update

Synopsis

Important: kernel-alt security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for kernel-alt 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-alt packages provide the Linux kernel version 4.x.

Security Fix(es):

  • kernel: Use after free via PI futex state (CVE-2021-3347)

  • kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)

  • kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)

  • kernel: powerpc: guest can cause DoS on POWER9 KVM hosts (CVE-2020-11669)

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 oops when resizing ext4 filesystem [rhel-alt-7.6.z] (BZ#1790900)

  • [ipv6][ipsec]:unregister_netdevice: waiting for lo to become free. Usage count = 4 (BZ#1920805)

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 Power 97ppc64le
Red Hat Enterprise Linux for IBM System z (Structure A)7s390x

Updated Packages

  • kernel-bootwrapper-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-debug-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-debug-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-devel-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-doc-4.14.0-115.36.1.el7a.noarch.rpm
  • kernel-debuginfo-common-s390x-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-debug-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-headers-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-abi-whitelists-4.14.0-115.36.1.el7a.noarch.rpm
  • kernel-debuginfo-common-ppc64le-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-tools-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-devel-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-alt-4.14.0-115.36.1.el7a.src.rpm
  • kernel-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-headers-4.14.0-115.36.1.el7a.s390x.rpm
  • perf-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-kdump-4.14.0-115.36.1.el7a.s390x.rpm
  • perf-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-debug-devel-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-kdump-devel-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-tools-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-tools-libs-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-debug-devel-4.14.0-115.36.1.el7a.s390x.rpm
  • kernel-tools-libs-devel-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-kdump-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
  • python-perf-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
  • python-perf-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
  • python-perf-4.14.0-115.36.1.el7a.s390x.rpm
  • perf-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
  • kernel-debug-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
  • python-perf-4.14.0-115.36.1.el7a.ppc64le.rpm
  • perf-4.14.0-115.36.1.el7a.ppc64le.rpm

Fixes

CVEs

References

Additional information