iommu/sva: Fix crash in iommu_sva_unbind_device()

{
  "id": "eeafb0e7defcc057098655418763c5eca4354b2e915b46f9060aa26c8b47152f",
  "url": "https://osv.dev/vulnerability/CVE-2026-23429",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iommu/sva: Fix crash in iommu_sva_unbind_device()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: iommu/sva: Fix crash in iommu_sva_unbind_device() domain->mm->iommu_mm can be freed by iommu_domain_free(): iommu_domain_free() mmdrop() __mmdrop() mm_pasid_drop() After iommu_domain_free() returns, accessing domain->mm->iommu_mm may dereference a freed mm structure, leading to a crash. Fix this by moving the code that accesses domain->mm->iommu_mm to before the call to iommu_domain_free().",
    "evidence": "osv:CVE-2026-23429",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.20",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-23429",
      "aliases": [
        "CVE-2026-23429"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "events": [
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                {
                  "fixed": "58abeb7b9562f25bdfa2f5ae5ce803eb02e74433"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "type": "GIT",
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            "v6.18.15",
            "v6.18.14",
            "v6.18.13",
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            "v6.18.9",
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23429.json"
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        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
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              "type": "ECOSYSTEM",
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23429.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.973673630Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/06e14c36e20b48171df13d51b89fe67c594ed07a",
        "https://git.kernel.org/stable/c/58abeb7b9562f25bdfa2f5ae5ce803eb02e74433",
        "https://git.kernel.org/stable/c/f5daaa2c959d9f894fb5b1ab76da8612dd220a0d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23429.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23429",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23429.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23429",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495513,
  "published_at": "2026-04-03T15:15:15.856+00:00"
}