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====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2019:0818-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:0818
Issue date:        2019-04-23
CVE Names:         CVE-2019-6974 CVE-2019-7221
====================================================================
1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

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

Security Fix(es):

* Kernel: KVM: potential use-after-free via kvm_ioctl_create_device()
(CVE-2019-6974)

* Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the
preemption timer (CVE-2019-7221)

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):

* rbd: avoid corruption on partially completed bios [rhel-7.6.z]
(BZ#1672514)

* xfs_vm_writepages deadly embrace between kworker and user task.
[rhel-7.6.z] (BZ#1673281)

* Offload Connections always get vlan priority 0 [rhel-7.6.z] (BZ#1673821)

* [NOKIA] RHEL sends flood of Neighbour Solicitations under specific
conditions [rhel-7.6.z] (BZ#1677179)

* RHEL 7.6 - Host crash occurred on NVMe/IB system while running controller
reset [rhel-7.6.z] (BZ#1678214)

* [rhel7] raid0 md workqueue deadlock with stacked md devices [rhel-7.6.z]
(BZ#1678215)

* [PureStorage7.6]nvme disconnect following an unsuccessful Admin queue
creation causes kernel panic [rhel-7.6.z] (BZ#1678216)

* RFC: Regression with -fstack-check in 'backport upstream large stack
guard patch to RHEL6' patch [rhel-7.6.z] (BZ#1678221)

* [Hyper-V] [RHEL 7.6]hv_netvsc: Fix a network regression after ifdown/ifup
[rhel-7.6.z] (BZ#1679997)

* rtc_cmos: probe of 00:01 failed with error -16 [rhel-7.6.z] (BZ#1683078)

* ACPI WDAT watchdog update [rhel-7.6.z] (BZ#1683079)

* high ovs-vswitchd CPU usage when VRRP over VXLAN tunnel causing qrouter
fail-over [rhel-7.6.z] (BZ#1683093)

* Openshift node drops outgoing POD traffic due to NAT hashtable race in
__ip_conntrack_confirm() [rhel-7.6.z] (BZ#1686766)

* [Backport] [v3,2/2] net: igmp: Allow user-space configuration of igmp
unsolicited report interval [rhel-7.6.z] (BZ#1686771)

* [RHEL7.6]: Intermittently seen FIFO parity error on T6225-SO adapter
[rhel-7.6.z] (BZ#1687487)

* The number of unsolict report about IGMP is incorrect [rhel-7.6.z]
(BZ#1688225)

* RDT driver causing failure to boot on AMD Rome system with more than 255
CPUs [rhel-7.6.z] (BZ#1689120)

* mpt3sas_cm0: fault_state(0x2100)! [rhel-7.6.z] (BZ#1689379)

* rwsem in inconsistent state leading system to hung [rhel-7.6.z]
(BZ#1690323)

Users of kernel are advised to upgrade to these updated packages, which fix
these bugs.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

1671904 - CVE-2019-7221 Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer
1671913 - CVE-2019-6974 Kernel: KVM: potential use-after-free via kvm_ioctl_create_device()

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
kernel-3.10.0-957.12.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.12.1.el7.noarch.rpm
kernel-doc-3.10.0-957.12.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.12.1.el7.x86_64.rpm
kernel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.12.1.el7.x86_64.rpm
perf-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
kernel-3.10.0-957.12.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.12.1.el7.noarch.rpm
kernel-doc-3.10.0-957.12.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.12.1.el7.x86_64.rpm
kernel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.12.1.el7.x86_64.rpm
perf-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
kernel-3.10.0-957.12.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.12.1.el7.noarch.rpm
kernel-doc-3.10.0-957.12.1.el7.noarch.rpm

ppc64:
kernel-3.10.0-957.12.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debug-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.12.1.el7.ppc64.rpm
kernel-devel-3.10.0-957.12.1.el7.ppc64.rpm
kernel-headers-3.10.0-957.12.1.el7.ppc64.rpm
kernel-tools-3.10.0-957.12.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-957.12.1.el7.ppc64.rpm
perf-3.10.0-957.12.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
python-perf-3.10.0-957.12.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm

ppc64le:
kernel-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debug-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-devel-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-headers-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-tools-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.12.1.el7.ppc64le.rpm
perf-3.10.0-957.12.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
python-perf-3.10.0-957.12.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm

s390x:
kernel-3.10.0-957.12.1.el7.s390x.rpm
kernel-debug-3.10.0-957.12.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-957.12.1.el7.s390x.rpm
kernel-devel-3.10.0-957.12.1.el7.s390x.rpm
kernel-headers-3.10.0-957.12.1.el7.s390x.rpm
kernel-kdump-3.10.0-957.12.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-957.12.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-957.12.1.el7.s390x.rpm
perf-3.10.0-957.12.1.el7.s390x.rpm
perf-debuginfo-3.10.0-957.12.1.el7.s390x.rpm
python-perf-3.10.0-957.12.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.s390x.rpm

x86_64:
bpftool-3.10.0-957.12.1.el7.x86_64.rpm
kernel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.12.1.el7.x86_64.rpm
perf-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
kernel-debug-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.12.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-957.12.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.12.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
kernel-3.10.0-957.12.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.12.1.el7.noarch.rpm
kernel-doc-3.10.0-957.12.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.12.1.el7.x86_64.rpm
kernel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.12.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.12.1.el7.x86_64.rpm
perf-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
kernel-debug-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.12.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.12.1.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2019-6974
https://access.redhat.com/security/cve/CVE-2019-7221
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2019 Red Hat, Inc.
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