Sigurnosni nedostaci jezgre operacijskog sustava

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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/):

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

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

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

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

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

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

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/

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

Synopsis: Important: kernel-alt security and bug fix update
Advisory ID: RHSA-2019:0831-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0831
Issue date: 2019-04-23
CVE Names: CVE-2018-13053 CVE-2018-13094 CVE-2018-14734
CVE-2018-17972 CVE-2018-18281 CVE-2018-18386
CVE-2018-18397 CVE-2019-9213
=====================================================================

1. Summary:

An update for kernel-alt is now available for Red Hat Enterprise Linux 7.

2. Relevant releases/architectures:

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) – aarch64, noarch, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) – aarch64, noarch, ppc64le

3. Description:

The kernel-alt packages provide the Linux kernel version 4.x.

Security Fix(es):

* kernel: lack of check for mmap minimum address in expand_downwards in
mm/mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms
(CVE-2019-9213)

* kernel: use-after-free in ucma_leave_multicast in
drivers/infiniband/core/ucma.c (CVE-2018-14734)

* kernel: Unprivileged users able to inspect kernel stacks of arbitrary
tasks (CVE-2018-17972)

* kernel: TLB flush happens too late on mremap (CVE-2018-18281)

* kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of
service (CVE-2018-18386)

* kernel: userfaultfd bypasses tmpfs file permissions (CVE-2018-18397)

* kernel: Integer overflow in the alarm_timer_nsleep function
(CVE-2018-13053)

* kernel: NULL pointer dereference in xfs_da_shrink_inode function
(CVE-2018-13094)

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):

* Failed to boot with ftrace=function in kvm with 2vcpu (BZ#1501024)

* [ALT-7.5][x86_64] perf test 63 – inet_pton fails on x86_64 (BZ#1518836)

* BUG: potential out-of-bounds string access when forcing a SELinux label
on a file (BZ#1595706)

* stack out-of-bounds in smb{2,3}_create_lease_buf() on SMB2/SMB3 mounts
(BZ#1598757)

* [ALT-7.6][KVM][PANIC] ltp/lite proc01 – Unable to handle kernel paging
request at virtual address ffff7fe000200018 (BZ#1623193)

* Kernel lock up due to read/write lock (BZ#1636261)

* [RHEL-ALT] Fix potential Spectre v1 in tty code (BZ#1639679)

* [Huawei AArch64 7.6 Bug] HNS3: Vlan on HNS3 NIC cannot communicate
(BZ#1639713)

* [RHEL7.6-ALT][AWS] backport “nvme: update timeout module parameter type”
(BZ#1654958)

* ignore STABLE_FLAG of rmap_item->address in rmap_walk_ksm (BZ#1663565)

* RHEL-Alt-7.6 – kernel: zcrypt: fix specification exception on z196 at ap
probe (BZ#1670018)

* [Huawei AArch64 7.6 Bug] Flock over NFSv3 failed (BZ#1670650)

* [Huawei AArch64 7.6/7.6-z Bug] HNS3: if a single transmit packet(skb) has
more than 8 frags, will cause the NIC to be unavailable (BZ#1677643)

* krb5{,i,p} doesn’t work with older enctypes on aarch64 (BZ#1678922)

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/):

1597747 – CVE-2018-13053 kernel: Integer overflow in the alarm_timer_nsleep function
1597771 – CVE-2018-13094 kernel: NULL pointer dereference in xfs_da_shrink_inode function
1611005 – CVE-2018-14734 kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c
1636349 – CVE-2018-17972 kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks
1640598 – CVE-2018-18386 kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of service
1641548 – CVE-2018-18397 kernel: userfaultfd bypasses tmpfs file permissions
1645121 – CVE-2018-18281 kernel: TLB flush happens too late on mremap
1686136 – CVE-2019-9213 kernel: lack of check for mmap minimum address in expand_downwards in mm/mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms

6. Package List:

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
kernel-alt-4.14.0-115.7.1.el7a.src.rpm

aarch64:
kernel-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debug-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debug-devel-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-devel-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-headers-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-tools-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-tools-libs-4.14.0-115.7.1.el7a.aarch64.rpm
perf-4.14.0-115.7.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
python-perf-4.14.0-115.7.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm

noarch:
kernel-abi-whitelists-4.14.0-115.7.1.el7a.noarch.rpm
kernel-doc-4.14.0-115.7.1.el7a.noarch.rpm

ppc64le:
kernel-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-bootwrapper-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debug-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-devel-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-headers-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-tools-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-tools-libs-4.14.0-115.7.1.el7a.ppc64le.rpm
perf-4.14.0-115.7.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
python-perf-4.14.0-115.7.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm

s390x:
kernel-4.14.0-115.7.1.el7a.s390x.rpm
kernel-debug-4.14.0-115.7.1.el7a.s390x.rpm
kernel-debug-debuginfo-4.14.0-115.7.1.el7a.s390x.rpm
kernel-debug-devel-4.14.0-115.7.1.el7a.s390x.rpm
kernel-debuginfo-4.14.0-115.7.1.el7a.s390x.rpm
kernel-debuginfo-common-s390x-4.14.0-115.7.1.el7a.s390x.rpm
kernel-devel-4.14.0-115.7.1.el7a.s390x.rpm
kernel-headers-4.14.0-115.7.1.el7a.s390x.rpm
kernel-kdump-4.14.0-115.7.1.el7a.s390x.rpm
kernel-kdump-debuginfo-4.14.0-115.7.1.el7a.s390x.rpm
kernel-kdump-devel-4.14.0-115.7.1.el7a.s390x.rpm
perf-4.14.0-115.7.1.el7a.s390x.rpm
perf-debuginfo-4.14.0-115.7.1.el7a.s390x.rpm
python-perf-4.14.0-115.7.1.el7a.s390x.rpm
python-perf-debuginfo-4.14.0-115.7.1.el7a.s390x.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):

aarch64:
kernel-debug-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
kernel-tools-libs-devel-4.14.0-115.7.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.7.1.el7a.aarch64.rpm

noarch:
kernel-doc-4.14.0-115.7.1.el7a.noarch.rpm

ppc64le:
kernel-debug-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debug-devel-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
kernel-tools-libs-devel-4.14.0-115.7.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.7.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.7.1.el7a.ppc64le.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-2018-13053
https://access.redhat.com/security/cve/CVE-2018-13094
https://access.redhat.com/security/cve/CVE-2018-14734
https://access.redhat.com/security/cve/CVE-2018-17972
https://access.redhat.com/security/cve/CVE-2018-18281
https://access.redhat.com/security/cve/CVE-2018-18386
https://access.redhat.com/security/cve/CVE-2018-18397
https://access.redhat.com/security/cve/CVE-2019-9213
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/

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—–BEGIN PGP SIGNED MESSAGE—–
Hash: SHA256

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

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2019:0833-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0833
Issue date: 2019-04-23
CVE Names: CVE-2019-6974 CVE-2019-7221
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Realtime (v. 7) – noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) – noarch, x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.

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):

* VM hangs on RHEL rt-kernel and OSP 13 [rhel-7.6.z] (BZ#1688673)

* kernel-rt: update to the RHEL7.6.z batch#4 source tree (BZ#1689417)

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()
1688673 – VM hangs on RHEL rt-kernel and OSP 13 [rhel-7.6.z]
1689417 – kernel-rt: update to the RHEL7.6.z batch#4 source tree

6. Package List:

Red Hat Enterprise Linux for Real Time for NFV (v. 7):

Source:
kernel-rt-3.10.0-957.12.1.rt56.927.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-957.12.1.rt56.927.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debug-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-devel-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-trace-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-957.12.1.rt56.927.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-957.12.1.rt56.927.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-957.12.1.rt56.927.el7.noarch.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/

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—–END PGP SIGNATURE—–

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