Sigurnosni nedostaci jezgre operacijskog sustava

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

Synopsis: Important: kernel security, bug fix, and enhancement update
Advisory ID: RHSA-2019:0163-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0163
Issue date: 2019-01-29
CVE Names: CVE-2018-18397 CVE-2018-18559
=====================================================================

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: Use-after-free due to race condition in AF_PACKET implementation
(CVE-2018-18559)

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

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Bug Fix(es):

These updated kernel packages include also numerous bug fixes and
enhancements. Space precludes documenting all of the bug fixes in this
advisory. See the descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3827321

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/):

1641548 – CVE-2018-18397 kernel: userfaultfd bypasses tmpfs file permissions
1641878 – CVE-2018-18559 kernel: Use-after-free due to race condition in AF_PACKET implementation

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
kernel-3.10.0-957.5.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.5.1.el7.noarch.rpm
kernel-doc-3.10.0-957.5.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.5.1.el7.x86_64.rpm
kernel-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.5.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.5.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.5.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.5.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.5.1.el7.x86_64.rpm
perf-3.10.0-957.5.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
python-perf-3.10.0-957.5.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm

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

x86_64:
kernel-debug-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.5.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.5.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
kernel-3.10.0-957.5.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.5.1.el7.noarch.rpm
kernel-doc-3.10.0-957.5.1.el7.noarch.rpm

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

Red Hat Enterprise Linux Server (v. 7):

Source:
kernel-3.10.0-957.5.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.5.1.el7.noarch.rpm
kernel-doc-3.10.0-957.5.1.el7.noarch.rpm

ppc64:
kernel-3.10.0-957.5.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debug-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.5.1.el7.ppc64.rpm
kernel-devel-3.10.0-957.5.1.el7.ppc64.rpm
kernel-headers-3.10.0-957.5.1.el7.ppc64.rpm
kernel-tools-3.10.0-957.5.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-957.5.1.el7.ppc64.rpm
perf-3.10.0-957.5.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
python-perf-3.10.0-957.5.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm

ppc64le:
kernel-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debug-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-devel-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-headers-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-tools-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.5.1.el7.ppc64le.rpm
perf-3.10.0-957.5.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
python-perf-3.10.0-957.5.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm

s390x:
kernel-3.10.0-957.5.1.el7.s390x.rpm
kernel-debug-3.10.0-957.5.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-957.5.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-957.5.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-957.5.1.el7.s390x.rpm
kernel-devel-3.10.0-957.5.1.el7.s390x.rpm
kernel-headers-3.10.0-957.5.1.el7.s390x.rpm
kernel-kdump-3.10.0-957.5.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-957.5.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-957.5.1.el7.s390x.rpm
perf-3.10.0-957.5.1.el7.s390x.rpm
perf-debuginfo-3.10.0-957.5.1.el7.s390x.rpm
python-perf-3.10.0-957.5.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.s390x.rpm

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

ppc64:
kernel-debug-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.5.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-957.5.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.5.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.5.1.el7.ppc64le.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
kernel-3.10.0-957.5.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.5.1.el7.noarch.rpm
kernel-doc-3.10.0-957.5.1.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-2018-18397
https://access.redhat.com/security/cve/CVE-2018-18559
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: Moderate: kernel-alt security, bug fix, and enhancement update
Advisory ID: RHSA-2019:0162-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0162
Issue date: 2019-01-29
CVE Names: CVE-2018-10840
=====================================================================

1. Summary:

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 Moderate. 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 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: Heap-based buffer overflow in
fs/ext4/xattr.c:ext4_xattr_set_entry() with crafted ext4 image
(CVE-2018-10840)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Bug Fix(es):

These updated kernel-alt packages include also numerous bug fixes and
enhancements. Space precludes documenting all of the bug fixes in this
advisory. See the descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3824202

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/):

1582346 – CVE-2018-10840 kernel: Heap-based buffer overflow in fs/ext4/xattr.c:ext4_xattr_set_entry() with crafted ext4 image

6. Package List:

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

Source:
kernel-alt-4.14.0-115.5.1.el7a.src.rpm

aarch64:
kernel-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debug-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debug-devel-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-devel-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-headers-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-tools-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-tools-libs-4.14.0-115.5.1.el7a.aarch64.rpm
perf-4.14.0-115.5.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
python-perf-4.14.0-115.5.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm

noarch:
kernel-abi-whitelists-4.14.0-115.5.1.el7a.noarch.rpm
kernel-doc-4.14.0-115.5.1.el7a.noarch.rpm

ppc64le:
kernel-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-bootwrapper-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debug-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-devel-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-headers-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-tools-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-tools-libs-4.14.0-115.5.1.el7a.ppc64le.rpm
perf-4.14.0-115.5.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
python-perf-4.14.0-115.5.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm

s390x:
kernel-4.14.0-115.5.1.el7a.s390x.rpm
kernel-debug-4.14.0-115.5.1.el7a.s390x.rpm
kernel-debug-debuginfo-4.14.0-115.5.1.el7a.s390x.rpm
kernel-debug-devel-4.14.0-115.5.1.el7a.s390x.rpm
kernel-debuginfo-4.14.0-115.5.1.el7a.s390x.rpm
kernel-debuginfo-common-s390x-4.14.0-115.5.1.el7a.s390x.rpm
kernel-devel-4.14.0-115.5.1.el7a.s390x.rpm
kernel-headers-4.14.0-115.5.1.el7a.s390x.rpm
kernel-kdump-4.14.0-115.5.1.el7a.s390x.rpm
kernel-kdump-debuginfo-4.14.0-115.5.1.el7a.s390x.rpm
kernel-kdump-devel-4.14.0-115.5.1.el7a.s390x.rpm
perf-4.14.0-115.5.1.el7a.s390x.rpm
perf-debuginfo-4.14.0-115.5.1.el7a.s390x.rpm
python-perf-4.14.0-115.5.1.el7a.s390x.rpm
python-perf-debuginfo-4.14.0-115.5.1.el7a.s390x.rpm

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

aarch64:
kernel-debug-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
kernel-tools-libs-devel-4.14.0-115.5.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.5.1.el7a.aarch64.rpm

noarch:
kernel-doc-4.14.0-115.5.1.el7a.noarch.rpm

ppc64le:
kernel-debug-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debug-devel-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
kernel-tools-libs-devel-4.14.0-115.5.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.5.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.5.1.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-2018-10840
https://access.redhat.com/security/updates/classification/#moderate

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-rt security and bug fix update
Advisory ID: RHSA-2019:0188-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0188
Issue date: 2019-01-29
CVE Names: CVE-2018-18559
=====================================================================

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: Use-after-free due to race condition in AF_PACKET implementation
(CVE-2018-18559)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Bug Fix(es):

* The kernel-rt packages have been upgraded to the 3.10.0-957.5.1 source
tree, which provides a number of bug fixes over the previous version.
(BZ#1653822)

* Under certain circumstances, the following warning message, which
indicated a SCHED_DEADLINE bandwidth tracking mechanism error, occurred:

WARNING: CPU: 8 PID: 19536 at kernel/sched/deadline.c:64
dequeue_task_dl+0x121/0x140

This update fixes the sched_setscheduler() core kernel function, and
backports multiple upstream patches to the SCHED_DEADLINE scheduler. As a
result, the SCHED_DEADLINE bandwidth tracking mechanism is prevented from
error conditions, and the warning message no longer occurs. (BZ#1655439)

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/):

1641878 – CVE-2018-18559 kernel: Use-after-free due to race condition in AF_PACKET implementation

6. Package List:

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

Source:
kernel-rt-3.10.0-957.5.1.rt56.916.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-957.5.1.rt56.916.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm

Red Hat Enterprise Linux Realtime (v. 7):

Source:
kernel-rt-3.10.0-957.5.1.rt56.916.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-957.5.1.rt56.916.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-957.5.1.rt56.916.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-2018-18559
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: Moderate: kernel security and bug fix update
Advisory ID: RHSA-2019:0202-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0202
Issue date: 2019-01-29
CVE Names: CVE-2018-18397
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.5
Extended Update Support.

2. Relevant releases/architectures:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) – noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) – x86_64
Red Hat Enterprise Linux Server EUS (v. 7.5) – noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.5) – ppc64, ppc64le, x86_64

3. Description:

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

Security Fix(es):

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

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Bug Fix(es):

* When applying two instances of the kprobe debugging mechanism to the same
function, one of the kprobes in some cases failed, depending on the kernel
address space layout. Consequently, a kprobe registration error occurred.
This update fixes the bug in the kprobes registration code to properly
detect and handle ftrace-based kprobes. As a result, both kprobes now apply
successfully in the described scenario. (BZ#1647815)

* Under heavy mad packet load, the SELinux checks in the mad packet queries
for InfiniBand (IB) fabrics significantly increased the mad packet
execution time. Consequently, if a single machine was executing a large
perfquery to the IB switches of a High Performance (HPC) fabric, mad_rpc
timeouts occurred, and the query failed even with SELinux disabled. This
update eliminates the SELinux checks when SELinux is disabled. As a result,
the mad packet queries through perfquery now have their original run times
when SELinux is disabled. (BZ#1648810)

* Previously, a file-system shutdown process caused by an I/O error could
race against a running fstrim process to acquire a xfs buffer lock.
Consequently, the file-system shutdown process never completed due to a
deadlock and the file-system became unresponsive, unable to be unmounted.
This update fixes the lock ordering so that the deadlock no longer occurs
and the file-system shutdown process now completes in the described
scenario. (BZ#1657142)

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/):

1641548 – CVE-2018-18397 kernel: userfaultfd bypasses tmpfs file permissions

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.5):

Source:
kernel-3.10.0-862.27.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-862.27.1.el7.noarch.rpm

x86_64:
kernel-devel-3.10.0-862.27.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5):

x86_64:
kernel-debug-debuginfo-3.10.0-862.27.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.5):

Source:
kernel-3.10.0-862.27.1.el7.src.rpm

noarch:
kernel-doc-3.10.0-862.27.1.el7.noarch.rpm

ppc64:
kernel-debuginfo-common-ppc64-3.10.0-862.27.1.el7.ppc64.rpm

ppc64le:
python-perf-debuginfo-3.10.0-862.27.1.el7.ppc64le.rpm

s390x:
python-perf-debuginfo-3.10.0-862.27.1.el7.s390x.rpm

x86_64:
python-perf-debuginfo-3.10.0-862.27.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.5):

ppc64:
kernel-debug-debuginfo-3.10.0-862.27.1.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-862.27.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-862.27.1.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-2018-18397
https://access.redhat.com/security/updates/classification/#moderate

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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