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    RedHat: RHSA-2019-0324:01 Moderate: kernel security and bug fix update

    Date12 Feb 2019
    CategoryRed Hat
    47
    Posted ByLinuxSecurity Advisories
    An update for kernel is now available for Red Hat Enterprise Linux 7.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Moderate: kernel security and bug fix update
    Advisory ID:       RHSA-2019:0324-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2019:0324
    Issue date:        2019-02-12
    CVE Names:         CVE-2018-18397 
    =====================================================================
    
    1. Summary:
    
    An update for kernel is now available for Red Hat Enterprise Linux 7.4
    Extended Update Support.
    
    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 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
    
    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):
    
    * 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.
    
    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. 7.4):
    
    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/
    
    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 . More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2019 Red Hat, Inc.
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