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    RedHat: RHSA-2021-0136:01 Moderate: kernel-rt security and bug fix update

    Date 14 Jan 2021
    286
    Posted By LinuxSecurity Advisories
    An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 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-rt security and bug fix update
    Advisory ID:       RHSA-2021:0136-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2021:0136
    Issue date:        2021-01-14
    CVE Names:         CVE-2020-25641 
    =====================================================================
    
    1. Summary:
    
    An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2
    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 Real Time EUS (v. 8.2) - x86_64
    Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) - 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: soft-lockups in iov_iter_copy_from_user_atomic() could result in
    DoS (CVE-2020-25641)
    
    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):
    
    * kernel-rt: update RT source tree to the latest RHEL-8.2.z6 Batch source
    tree (BZ#1902783)
    
    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/):
    
    1881424 - CVE-2020-25641 kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS
    
    6. Package List:
    
    Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2):
    
    Source:
    kernel-rt-4.18.0-193.40.1.rt13.90.el8_2.src.rpm
    
    x86_64:
    kernel-rt-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-core-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-core-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-debuginfo-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-devel-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-kvm-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-modules-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-modules-extra-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debuginfo-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debuginfo-common-x86_64-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-devel-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-kvm-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-modules-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-modules-extra-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    
    Red Hat Enterprise Linux Real Time EUS (v. 8.2):
    
    Source:
    kernel-rt-4.18.0-193.40.1.rt13.90.el8_2.src.rpm
    
    x86_64:
    kernel-rt-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-core-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-core-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-debuginfo-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-devel-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-modules-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debug-modules-extra-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debuginfo-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-debuginfo-common-x86_64-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-devel-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-modules-4.18.0-193.40.1.rt13.90.el8_2.x86_64.rpm
    kernel-rt-modules-extra-4.18.0-193.40.1.rt13.90.el8_2.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-2020-25641
    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 2021 Red Hat, Inc.
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