GHSA-QQMX-G3HJ-X9H7

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Flush cache for PASID table before using it

When writing the address of a freshly allocated zero-initialized PASID table to a PASID directory entry, do that after the CPU cache flush for this PASID table, not before it, to avoid the time window when this PASID table may be already used by non-coherent IOMMU hardware while its contents in RAM is still some random old data, not zero-initialized.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45862"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:16:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Flush cache for PASID table before using it\n\nWhen writing the address of a freshly allocated zero-initialized PASID\ntable to a PASID directory entry, do that after the CPU cache flush for\nthis PASID table, not before it, to avoid the time window when this\nPASID table may be already used by non-coherent IOMMU hardware while\nits contents in RAM is still some random old data, not zero-initialized.",
  "id": "GHSA-qqmx-g3hj-x9h7",
  "modified": "2026-05-27T15:33:13Z",
  "published": "2026-05-27T15:33:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45862"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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