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        "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 8.\n\nRed 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.",
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        "category": "general",
        "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body (CVE-2020-12657)\n\nFor 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.\n\nBug Fix(es):\n\n* kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1827193)\n\n* kernel-rt: update RT source tree to the RHEL-8.2.z1 source tree (BZ#1816271)",
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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_2428.json"
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          "url": "https://access.redhat.com/errata/RHSA-2020:2428"
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          "details": "The default io scheduler for Red Hat Enterprise Linux 8 is the mq-deadline scheduler, however it can be \nconfigured to any of the available schedulers available on the system on a per-device basis.\n\nThe schedulers in use can be verified by the block devices entry in sysfs, for example for \"sda\":\n\n# cat /sys/block/sda/queue/scheduler \n[mq-deadline] kyber bfq none\n\nAll block devices in the system will need to be changed to be mitigated.  If the system workload requires\nbfq, this may not be an acceptable workaround however some systems may find changing io schedulers to be an\nacceptable workaround until system updates can be applied.\n\nSee https://access.redhat.com/solutions/3756041 for how to configure the io scheduler persistently across\nsystem reboots or contact Red Hat Global Support Services.",
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