RedHat: RHSA-2019-0324:01 Moderate: kernel security and bug fix update
Summary
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):
* The timeout handling in the libfc.ko kernel module did not work
correctly. This was happening during certain steps of the Fibre Channel
login procedure, when the timeout handling was not synchronized with the
state of a partially offloaded Fibre Channel over Ethernet (FCoE) in the
lower-level driver. Consequently, the offloaded FCoE state was incorrect,
which led to I/O timeout errors until the SCSI error recovery issued a host
reset. This update fixes the bug by improving the libfc.ko error handling
during the fabric login. As a result, the fabric login errors are addressed
in time, without the I/O timeouts in the described scenario. (BZ#1655042)
* Symmetric Multi-Processing (SMP) or Non-Uniform Memory Access (NUMA)
systems in some cases experienced deadlocks during a task migration and
task wakeup operations. Consequently, the systems terminated unexpectedly
with the following message:
NMI watchdog: Watchdog detected hard LOCKUP on
This update fixes the bug by queueing the stopper thread to run after locks
are released. As a result, the deadlocks and the system crashes no longer
occur in the described scenario. (BZ#1667326)
Users of kernel are advised to upgrade to these updated packages, which fix
these bugs.
Summary
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.
References
https://access.redhat.com/security/cve/CVE-2018-18397 https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4):
Source:
kernel-3.10.0-693.44.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.44.1.el7.noarch.rpm
kernel-doc-3.10.0-693.44.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.44.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.44.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.44.1.el7.x86_64.rpm
perf-3.10.0-693.44.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
python-perf-3.10.0-693.44.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4):
x86_64:
kernel-debug-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.44.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.4):
Source:
kernel-3.10.0-693.44.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.44.1.el7.noarch.rpm
kernel-doc-3.10.0-693.44.1.el7.noarch.rpm
ppc64:
kernel-3.10.0-693.44.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debug-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-693.44.1.el7.ppc64.rpm
kernel-devel-3.10.0-693.44.1.el7.ppc64.rpm
kernel-headers-3.10.0-693.44.1.el7.ppc64.rpm
kernel-tools-3.10.0-693.44.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-693.44.1.el7.ppc64.rpm
perf-3.10.0-693.44.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
python-perf-3.10.0-693.44.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
ppc64le:
kernel-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debug-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-devel-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-headers-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-tools-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-693.44.1.el7.ppc64le.rpm
perf-3.10.0-693.44.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
python-perf-3.10.0-693.44.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
s390x:
kernel-3.10.0-693.44.1.el7.s390x.rpm
kernel-debug-3.10.0-693.44.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-693.44.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-693.44.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-693.44.1.el7.s390x.rpm
kernel-devel-3.10.0-693.44.1.el7.s390x.rpm
kernel-headers-3.10.0-693.44.1.el7.s390x.rpm
kernel-kdump-3.10.0-693.44.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-693.44.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-693.44.1.el7.s390x.rpm
perf-3.10.0-693.44.1.el7.s390x.rpm
perf-debuginfo-3.10.0-693.44.1.el7.s390x.rpm
python-perf-3.10.0-693.44.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.s390x.rpm
x86_64:
kernel-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.44.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.44.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.44.1.el7.x86_64.rpm
perf-3.10.0-693.44.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
python-perf-3.10.0-693.44.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.4):
ppc64:
kernel-debug-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-693.44.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-693.44.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm
ppc64le:
kernel-debug-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-693.44.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm
x86_64:
kernel-debug-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.44.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.44.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.44.1.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/
Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.4Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.4) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.4) - ppc64, ppc64le, x86_64
Bugs Fixed
1641548 - CVE-2018-18397 kernel: userfaultfd bypasses tmpfs file permissions