rhsa-2023_4021
Vulnerability from csaf_redhat
Published
2023-07-11 07:53
Modified
2024-11-15 13:35
Summary
Red Hat Security Advisory: kernel security and bug fix update

Notes

Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support. 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 packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c (CVE-2022-3564) 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): * The iscsi target deadlocks when the same host acts as an initiator to itself (i.e. connects via 127.0.0.1) (BZ#2183541) * Double free issue in filelayout_alloc_commit_info (BZ#2212878) * RHEL 7.2: XFS inode cluster corruption [rhel-7.9.z] (BZ#2213361)
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": "2150999"
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          "category": "description",
          "text": "A use-after-free flaw was found in the Linux kernel\u2019s L2CAP bluetooth functionality in how a user triggers a race condition by two malicious flows in the L2CAP bluetooth packets. This flaw allows a local or bluetooth connection user to crash the system or potentially escalate privileges.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue is rated between Moderate and Important (similar to the CVE-2022-45934) because of no known attack, and the attack would be complex. Anyway, consider this CVE-2022-3564 as Important because the use-after-free can potentially lead to privilege escalation or a potential remote system crash (and currently, a read after-free that in most cases would not lead to a remote system crash).",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2022-3564"
        },
        {
          "category": "external",
          "summary": "RHBZ#2150999",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2150999"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2022-3564",
          "url": "https://www.cve.org/CVERecord?id=CVE-2022-3564"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-3564",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3564"
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        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=89f9f3cb86b1c63badaf392a83dd661d56cc50b1",
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=89f9f3cb86b1c63badaf392a83dd661d56cc50b1"
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      "release_date": "2022-10-04T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2023-07-11T07:53:47+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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          "restart_required": {
            "category": "machine"
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          "url": "https://access.redhat.com/errata/RHSA-2023:4021"
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            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c"
    }
  ]
}


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