RHSA-2019:1973
Vulnerability from csaf_redhat
Published
2019-07-30 13:20
Modified
2025-10-09 19:50
Summary
Red Hat Security Advisory: kernel-alt security and bug fix update

Notes

Topic
An update for kernel-alt 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-alt packages provide the Linux kernel version 4.x. Security Fix(es): * Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900) 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): * Pegas1.1 - 7.5-alt s390x kernel oops in update_cfs_rq_h_load (BZ#1557242) * race of lockd/nfsd inetaddr notifiers with pointers change (BZ#1637541) * lockd: possible double unregister of inetaddr notifiers (BZ#1637542) * [Huawei AArch64 7.6 Bug] During the virtual machine migration process, NFS may trigger a system panic. (BZ#1671943) * RHEL-Alt-7.6 - jit'd java code on power9 ppc64le experiences stack corruption (BZ#1707630) Users of kernel-alt are advised to upgrade to these updated packages, which fix these bugs.
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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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Jason Wang"
          ],
          "organization": "Red Hat Inc.",
          "summary": "This issue was discovered by Red Hat."
        }
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      "cve": "CVE-2019-3900",
      "cwe": {
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        "name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
      },
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      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1698757"
        }
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        {
          "category": "description",
          "text": "An infinite loop issue was found in the vhost_net kernel module while handling incoming packets in handle_rx(). The infinite loop could occur if one end sends packets faster than the other end can process them. A guest user, maybe a remote one, could use this flaw to stall the vhost_net kernel thread, resulting in a DoS scenario.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Kernel: vhost_net: infinite loop while receiving packets leads to DoS",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.\n\nThis issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 6 and 7. Future kernel updates for Red Hat Enterprise Linux 6 and 7 may 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.",
          "title": "CVSS score applicability"
        }
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-3900"
        },
        {
          "category": "external",
          "summary": "RHBZ#1698757",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1698757"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-3900",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-3900"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-3900",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-3900"
        }
      ],
      "release_date": "2019-04-25T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2019-07-30T13:20:18+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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      "scores": [
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          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H",
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "Kernel: vhost_net: infinite loop while receiving packets leads to DoS"
    }
  ]
}


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