rhsa-2021_2316
Vulnerability from csaf_redhat
Published
2021-06-08 22:44
Modified
2024-11-15 11:50
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 Intel(R) Graphics Drivers (CVE-2020-12362) * kernel: Use after free via PI futex state (CVE-2021-3347) * kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648) * kernel: Improper input validation in some Intel(R) Graphics Drivers (CVE-2020-12363) * kernel: Null pointer dereference in some Intel(R) Graphics Drivers (CVE-2020-12364) * kernel: Speculation on pointer arithmetic against bpf_context pointer (CVE-2020-27170) 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): * lru-add-drain workqueue on RT is allocated without being used (BZ#1894587) * kernel-rt: update to the latest RHEL7.9.z source tree (BZ#1953118)
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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        "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: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)\n\n* kernel: Use after free via PI futex state (CVE-2021-3347)\n\n* kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648)\n\n* kernel: Improper input validation in some Intel(R) Graphics Drivers (CVE-2020-12363)\n\n* kernel: Null pointer dereference in some Intel(R) Graphics Drivers (CVE-2020-12364)\n\n* kernel: Speculation on pointer arithmetic against bpf_context pointer (CVE-2020-27170)\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* lru-add-drain workqueue on RT is allocated without being used (BZ#1894587)\n\n* kernel-rt: update to the latest RHEL7.9.z source tree (BZ#1953118)",
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          "text": "A use-after-free flaw was found in the Linux kernel console driver when using the copy-paste buffer. This flaw allows a local user  to crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c",
          "title": "Vulnerability summary"
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        {
          "category": "other",
          "text": "The impact is moderate, because of the need of additional privileges (usually local console user).",
          "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.",
          "title": "CVSS score applicability"
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: Use after free via PI futex state"
    }
  ]
}


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