Issued:

2021-04-06

Updated:

2021-04-06

RHSA-2021:1071 - Important: kernel security and bug fix update

Synopsis

Important: kernel security and bug fix update

Type/Severity

Security Advisory Important

Topic

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

Security Fix(es):

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

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

• kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)

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):

• Customer testing eMMC sees and intermittent boot problem on 7.8+, was not seen on 7.3 (BZ#1918916)

• tcm loopback driver causes double-start of scsi command when work is delayed (BZ#1925652)

• [Azure][RHEL-7]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1925691)

• A patch from upstream c365c292d059 causes us to end up leaving rt_nr_boosted in an inconsistent state, which causes a hard lockup. (BZ#1928082)

• [RHEL7.9.z] Add fix to update snd_wl1 in bulk receiver fast path (BZ#1929804)

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

Updated Packages

• kernel-debug-debuginfo-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-tools-libs-devel-3.10.0-1160.24.1.el7.ppc64le.rpm
• python-perf-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-debug-debuginfo-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-kdump-debuginfo-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-bootwrapper-3.10.0-1160.24.1.el7.ppc64.rpm
• python-perf-3.10.0-1160.24.1.el7.s390x.rpm
• perf-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-debuginfo-common-s390x-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-tools-3.10.0-1160.24.1.el7.ppc64.rpm
• bpftool-debuginfo-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-kdump-devel-3.10.0-1160.24.1.el7.s390x.rpm
• bpftool-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-tools-libs-3.10.0-1160.24.1.el7.ppc64le.rpm
• python-perf-debuginfo-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-debuginfo-common-x86_64-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-debug-devel-3.10.0-1160.24.1.el7.ppc64.rpm
• bpftool-3.10.0-1160.24.1.el7.x86_64.rpm
• bpftool-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-debug-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-headers-3.10.0-1160.24.1.el7.x86_64.rpm
• bpftool-debuginfo-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-tools-debuginfo-3.10.0-1160.24.1.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-devel-3.10.0-1160.24.1.el7.x86_64.rpm
• perf-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-bootwrapper-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-debug-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-debuginfo-3.10.0-1160.24.1.el7.ppc64.rpm
• bpftool-debuginfo-3.10.0-1160.24.1.el7.ppc64le.rpm
• perf-3.10.0-1160.24.1.el7.x86_64.rpm
• python-perf-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-devel-3.10.0-1160.24.1.el7.ppc64le.rpm
• bpftool-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-tools-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
• perf-3.10.0-1160.24.1.el7.s390x.rpm
• python-perf-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-debuginfo-common-ppc64le-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-debug-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-tools-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-devel-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-doc-3.10.0-1160.24.1.el7.noarch.rpm
• perf-debuginfo-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-debug-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-abi-whitelists-3.10.0-1160.24.1.el7.noarch.rpm
• perf-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-kdump-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-tools-libs-3.10.0-1160.24.1.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-tools-libs-devel-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-headers-3.10.0-1160.24.1.el7.s390x.rpm
• bpftool-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-3.10.0-1160.24.1.el7.src.rpm
• kernel-debuginfo-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-devel-3.10.0-1160.24.1.el7.ppc64.rpm
• python-perf-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-tools-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-debug-devel-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-debug-debuginfo-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-debug-devel-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-debug-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-headers-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-tools-libs-3.10.0-1160.24.1.el7.x86_64.rpm
• kernel-debug-devel-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-tools-libs-devel-3.10.0-1160.24.1.el7.ppc64.rpm
• perf-debuginfo-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-tools-debuginfo-3.10.0-1160.24.1.el7.ppc64le.rpm
• kernel-debuginfo-common-ppc64-3.10.0-1160.24.1.el7.ppc64.rpm
• kernel-debuginfo-3.10.0-1160.24.1.el7.s390x.rpm
• kernel-headers-3.10.0-1160.24.1.el7.ppc64le.rpm
• perf-debuginfo-3.10.0-1160.24.1.el7.s390x.rpm

Fixes

• This content is not included.BZ - 1930078
• This content is not included.BZ - 1930079
• This content is not included.BZ - 1930080

CVEs

• CVE-2021-27363
• CVE-2021-27364
• CVE-2021-27365

References

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

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.