RedHat: RHSA-2019-2830:01 Important: kernel-rt security update

    Date19 Sep 2019
    CategoryRed Hat
    515
    Posted ByLinuxSecurity Advisories
    An update for kernel-rt 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
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: kernel-rt security update
    Advisory ID:       RHSA-2019:2830-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2830
    Issue date:        2019-09-20
    CVE Names:         CVE-2019-14835 
    =====================================================================
    
    1. Summary:
    
    An update for kernel-rt 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 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):
    
    * A buffer overflow flaw was found in the way Linux kernel's vhost
    functionality that translates virtqueue buffers to IOVs, logged the buffer
    descriptors during migration. A privileged guest user able to pass
    descriptors with invalid length to the host when migration is underway,
    could use this flaw to increase their privileges on the host.
    (CVE-2019-14835)
    
    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/):
    
    1750727 - CVE-2019-14835 kernel: vhost-net: guest to host kernel escape during migration
    
    6. Package List:
    
    Red Hat Enterprise Linux for Real Time for NFV (v. 7):
    
    Source:
    kernel-rt-3.10.0-1062.1.2.rt56.1025.el7.src.rpm
    
    noarch:
    kernel-rt-doc-3.10.0-1062.1.2.rt56.1025.el7.noarch.rpm
    
    x86_64:
    kernel-rt-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-devel-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-kvm-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-kvm-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debuginfo-common-x86_64-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-devel-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-kvm-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-kvm-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-devel-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-kvm-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-kvm-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    
    Red Hat Enterprise Linux Realtime (v. 7):
    
    Source:
    kernel-rt-3.10.0-1062.1.2.rt56.1025.el7.src.rpm
    
    noarch:
    kernel-rt-doc-3.10.0-1062.1.2.rt56.1025.el7.noarch.rpm
    
    x86_64:
    kernel-rt-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debug-devel-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-debuginfo-common-x86_64-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-devel-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-debuginfo-3.10.0-1062.1.2.rt56.1025.el7.x86_64.rpm
    kernel-rt-trace-devel-3.10.0-1062.1.2.rt56.1025.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-2019-14835
    https://access.redhat.com/security/updates/classification/#important
    https://access.redhat.com/security/vulnerabilities/kernel-vhost
    
    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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