{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "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 Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/centos-stream8els/vex/2025/cve-2025-31936-els_os-centos-stream8els.json"
      }
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      "generator": {
        "date": "2026-09-11T18:02:35Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2025-31936-ELS_OS-CENTOS-STREAM8ELS",
      "initial_release_date": "2025-01-01T00:00:00Z",
      "revision_history": [
        {
          "date": "2025-01-01T00:00:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-09-09T13:18:49Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-09-09T16:38:09Z",
          "number": "3",
          "summary": "Update document"
        },
        {
          "date": "2026-09-11T18:02:35Z",
          "number": "4",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "4"
    },
    "title": "Security update on CVE-2025-31936"
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  "vulnerabilities": [
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      "cve": "CVE-2025-31936",
      "cwe": {
        "id": "CWE-1260",
        "name": "Improper Handling of Overlap Between Protected Memory Ranges"
      },
      "notes": [
        {
          "category": "description",
          "text": "Improper handling of overlap between protected memory ranges for some Intel(R) Xeon(R) 6 processors when using Intel(R) TDX within SMM may allow an escalation of privilege. SMM adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.",
          "title": "Vulnerability description"
        }
      ],
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          "CentOS-Stream-8:microcode_ctl-4:20250211-2.el8.x86_64",
          "CentOS-Stream-8:microcode_ctl-4:20250512-2.el8.tuxcare.els1.x86_64",
          "CentOS-Stream-8:microcode_ctl-4:20250512-2.el8.x86_64",
          "CentOS-Stream-8:microcode_ctl-4:20251111-2.el8.tuxcare.els1.x86_64",
          "CentOS-Stream-8:microcode_ctl-4:20251111-2.el8.x86_64",
          "CentOS-Stream-8:microcode_ctl-4:20260812-2.el8.tuxcare.els1.x86_64",
          "CentOS-Stream-8:microcode_ctl-4:20260812-2.el8.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2025-31936"
        },
        {
          "category": "external",
          "summary": "https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01379.html",
          "url": "https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01379.html"
        }
      ],
      "release_date": "2026-08-11T17:17:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-09-09T14:21:23.190398Z",
          "details": "This issue is tightly scoped to Intel Xeon 6 hardware using Intel TDX specifically within System Management Mode (SMM) and requires a local, already-privileged actor plus high-complexity, platform‑specific knowledge, making practical exploitation in managed VM/server environments unlikely. Guest operating systems and workloads do not execute in SMM, so typical virtualized deployments cannot directly reach the vulnerable TDX‑in‑SMM path even with admin privileges. With no availability impact and multiple preconditions (hardware, TDX-in‑SMM configuration, and elevated local access), the operational risk is low and this CVE can be safely deprioritized.",
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}