rhsa-2021_3445
Vulnerability from csaf_redhat
Published
2021-09-07 15:17
Modified
2024-11-05 23:54
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update

Notes

Topic
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 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.
Details
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: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512) * kernel: use-after-free in route4_change() in net/sched/cls_route.c (CVE-2021-3715) 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): * OSLAT spikes on subset of cpus (BZ#1986064) * Failure to enter full_nohz due to needless SCHED softirqs (BZ#1990273) * kernel-rt: update RT source tree to the latest RHEL-8.2.z12 Batch source tree (BZ#1997761)
Terms of Use
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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          "text": "For Red Hat Enterprise Linux 7 only out of bounds memory read possible instead of write and no code that depends on this memory read, so considering the impact Moderate instead of Important. Both this has very low chances of being exploited in the wild: attacker either need to physically plug a malicious device in a USB port or attacker would have to use uhid or any other virtual USB implementation, meaning that likely already have root access be able to trigger that.",
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          "url": "https://www.cve.org/CVERecord?id=CVE-2021-3715"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-3715",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3715"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef299cc3fa1a9e1288665a9fdc8bff55629fd359",
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef299cc3fa1a9e1288665a9fdc8bff55629fd359"
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          "date": "2021-09-07T15:17:46+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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      "title": "kernel: use-after-free in route4_change() in net/sched/cls_route.c"
    }
  ]
}


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