rhsa-2021_0338
Vulnerability from csaf_redhat
Published
2021-02-02 12:11
Modified
2024-11-15 07:28
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 Moderate. 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 fs/block_dev.c (CVE-2020-15436) * kernel: Nfsd failure to clear umask after processing an open or create (CVE-2020-35513) 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): * kernel-rt: update to the latest RHEL7.9.z3 source tree (BZ#1906133) * [kernel-rt] WARNING: CPU: 8 PID: 586 at kernel/sched/core.c:3644 migrate_enable+0x15f/0x210 (BZ#1916123) * [kernel-rt-debug] [ BUG: bad unlock balance detected! ] [RHEL-7.9.z] (BZ#1916130)
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 Moderate. 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": "description",
          "text": "A use-after-free flaw was observed in blkdev_get(), in fs/block_dev.c after a call to __blkdev_get() fails, and its refcount gets freed/released. This problem may cause a denial of service problem with a special user privilege, and may even lead to a confidentiality issue.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: use-after-free in fs/block_dev.c",
          "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"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-35513"
        },
        {
          "category": "external",
          "summary": "RHBZ#1911309",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1911309"
        },
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-35513",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-35513"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-35513",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35513"
        },
        {
          "category": "external",
          "summary": "https://patchwork.kernel.org/project/linux-nfs/patch/20180403203916.GH20297@fieldses.org/",
          "url": "https://patchwork.kernel.org/project/linux-nfs/patch/20180403203916.GH20297@fieldses.org/"
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      "title": "kernel: Nfsd failure to clear umask after processing an open or create"
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  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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