{
  "cveId": "CVE-2026-93834",
  "url": "https://patchblox.com/security/cve/CVE-2026-93834",
  "summary": "CVE-2026-93834 is fixed in 33 products on 1 platform, first by DEBIAN-CVE-2026-93834, released October 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Qemu-kvm: 9pfs: use-after-free race in tlcreate/twalk allows vm guest escape",
  "description": "A use-after-free vulnerability was found in QEMU\u0027s 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and code execution (VM escape) as the QEMU process user.",
  "published": "2026-09-25T14:17:24Z",
  "severity": "Important",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "cwe": "Use After Free",
  "epss": 0.00405,
  "epssPercentile": 0.35,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93834",
  "fixes": [
    {
      "platform": "linux",
      "product": "qemu",
      "release": "Debian 14",
      "fixedVersion": "1:11.1.2\u002Bds-1",
      "fix": "DEBIAN-CVE-2026-93834",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93834",
      "released": "2026-10-06T21:56:27Z"
    },
    {
      "platform": "linux",
      "product": "qemu",
      "release": "amzn 2023",
      "fixedVersion": "2:11.0.0-4.amzn2023",
      "fix": "ALAS2023-2026-3241",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3241",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "qemu",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "10.0.13-160000.2.1",
      "fix": "OPENSUSE-SU-2026:22047-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22047-1",
      "released": "2026-10-07T09:59:52Z"
    },
    {
      "platform": "linux",
      "product": "qemu",
      "release": "sles 16.0",
      "fixedVersion": "10.0.13-160000.2.1",
      "fix": "SUSE-SU-2026:24159-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24159-1",
      "released": "2026-10-07T09:57:02Z"
    },
    {
      "platform": "linux",
      "product": "qemu-common",
      "release": "amzn 2023",
      "fixedVersion": "2:11.0.0-4.amzn2023",
      "fix": "ALAS2023-2026-3241",
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      "released": "2026-11-07T01:06:07Z"
    },
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      "fix": "ALAS2023-2026-3241",
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      "released": "2026-11-07T01:06:07Z"
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      "fix": "ALAS2023-2026-3241",
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      "released": "2026-11-07T01:06:07Z"
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      "fix": "ALAS2023-2026-3241",
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      "released": "2026-11-07T01:06:07Z"
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      "fix": "ALAS2023-2026-3241",
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      "released": "2026-11-07T01:06:07Z"
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      "released": "2026-11-07T01:06:07Z"
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      "released": "2026-10-07T09:59:52Z"
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      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24159-1",
      "released": "2026-10-07T09:57:02Z"
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}