rhsa-2020_0100
Vulnerability from csaf_redhat
Published
2020-01-14 08:06
Modified
2024-11-05 21:42
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 MRG 2. 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: Use-after-free in __blk_drain_queue() function in block/blk-core.c (CVE-2018-20856) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) 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): * update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1779367)
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": "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 __blk_drain_queue() function in block/blk-core.c (CVE-2018-20856)\n\n* kernel: TLB flush happens too late on mremap (CVE-2018-18281)\n\n* kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599)\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* update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1779367)",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: Use-after-free in __blk_drain_queue() function in block/blk-core.c"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Andrea Arcangeli"
          ],
          "organization": "Red Hat Engineering",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2019-11599",
      "cwe": {
        "id": "CWE-667",
        "name": "Improper Locking"
      },
      "discovery_date": "2019-04-30T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1705937"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel where the coredump implementation does not use locking or other mechanisms to prevent vma layout or vma flags changes while it runs. This allows local users to obtain sensitive information, cause a denial of service (DoS), or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-11599"
        },
        {
          "category": "external",
          "summary": "RHBZ#1705937",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1705937"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-11599",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-11599"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-11599",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-11599"
        }
      ],
      "release_date": "2019-04-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-01-14T08:06:10+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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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2020:0100"
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.0"
          },
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping"
    }
  ]
}


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