rhsa-2018_1944
Vulnerability from csaf_redhat
Published
2018-06-19 13:18
Modified
2024-11-15 02:10
Summary
Red Hat Security Advisory: kernel-rt security 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: FPU state information leakage via lazy FPU restore (CVE-2018-3665) 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 Julian Stecklina (Amazon.de), Thomas Prescher (cyberus-technology.de), and Zdenek Sojka (sysgo.com) for reporting this issue.
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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      "acknowledgments": [
        {
          "names": [
            "Julian Stecklina"
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          "organization": "Amazon.de"
        },
        {
          "names": [
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          "organization": "cyberus-technology.de"
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          "organization": "sysgo.com"
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      "cve": "CVE-2018-3665",
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        "id": "CWE-200",
        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
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      "discovery_date": "2018-03-12T00:00:00+00:00",
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          "text": "1585011"
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          "category": "description",
          "text": "A Floating Point Unit (FPU) state information leakage flaw was found in the way the Linux kernel saved and restored the FPU state during task switch. Linux kernels that follow the \"Lazy FPU Restore\" scheme are vulnerable to the FPU state information leakage issue. An unprivileged local attacker could use this flaw to read FPU state bits by conducting targeted cache side-channel attacks, similar to the Meltdown vulnerability disclosed earlier this year.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Kernel: FPU state information leakage via lazy FPU restore",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6, 7, and Red Hat Enterprise MRG 2 may address this issue.\n\nRed Hat Enterprise Linux 5 is now in Production 3 Phase of the support and\nmaintenance life cycle. This has been rated as having Moderate security\nimpact and is not currently planned to be addressed in future updates. For\nadditional information, refer to the Red Hat Enterprise Linux Life\nCycle: https://access.redhat.com/support/policy/updates/errata/.",
          "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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      "title": "Kernel: FPU state information leakage via lazy FPU restore"
    }
  ]
}


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