rhsa-2018_2763
Vulnerability from csaf_redhat
Published
2018-09-25 19:06
Modified
2024-11-15 00:35
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 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.
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: Integer overflow in Linux's create_elf_tables function (CVE-2018-14634) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Qualys Research Labs for reporting this issue. Bug Fix(es): * The kernel-rt packages have been upgraded to the 3.10.0-862.14.3 source tree, which provides a number of bug fixes over the previous version. (BZ#1616429) * Previously, preemption was enabled too early after a context switch. If a task was migrated to another CPU after a context switch, a mismatch between CPU and runqueue during load balancing sometimes occurred. Consequently, a runnable task on an idle CPU failed to run, and the operating system became unresponsive. This update disables preemption in the schedule_tail() function. As a result, CPU migration during post-schedule processing no longer occurs, which prevents the above mismatch. The operating system no longer hangs due to this bug. (BZ#1617941)
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": "An update for kernel-rt is now available for Red Hat Enterprise Linux 7.\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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      "cve": "CVE-2018-14634",
      "cwe": {
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          "category": "description",
          "text": "An integer overflow flaw was found in the Linux kernel\u0027s create_elf_tables() function.  An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system.",
          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "kernel: Integer overflow in Linux\u0027s create_elf_tables function",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect 32-bit systems as they do not have a large enough address space to exploit this flaw.\n\nSystems with less than 32GB of memory are very unlikely to be affected by this issue due to memory demands during exploitation.\n\nThis issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5.\n\nThis issue affects the version of the kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2 will address this issue.",
          "title": "Statement"
        },
        {
          "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.",
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-14634"
        },
        {
          "category": "external",
          "summary": "RHBZ#1624498",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1624498"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-14634",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-14634"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-14634",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14634"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/vulnerabilities/mutagen-astronomy",
          "url": "https://access.redhat.com/security/vulnerabilities/mutagen-astronomy"
        },
        {
          "category": "external",
          "summary": "https://www.openwall.com/lists/oss-security/2018/09/25/4",
          "url": "https://www.openwall.com/lists/oss-security/2018/09/25/4"
        }
      ],
      "release_date": "2018-09-25T17:00:00+00:00",
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          "date": "2018-09-25T19:06:13+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: Integer overflow in Linux\u0027s create_elf_tables function"
    }
  ]
}


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Sightings

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