ghsa-4fjc-772g-jpj6
Vulnerability from github
Published
2025-09-05 18:31
Modified
2025-11-24 21:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

iommufd: Prevent ALIGN() overflow

When allocating IOVA the candidate range gets aligned to the target alignment. If the range is close to ULONG_MAX then the ALIGN() can wrap resulting in a corrupted iova.

Open code the ALIGN() using get_add_overflow() to prevent this. This simplifies the checks as we don't need to check for length earlier either.

Consolidate the two copies of this code under a single helper.

This bug would allow userspace to create a mapping that overlaps with some other mapping or a reserved range.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38688"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-04T16:15:36Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Prevent ALIGN() overflow\n\nWhen allocating IOVA the candidate range gets aligned to the target\nalignment. If the range is close to ULONG_MAX then the ALIGN() can\nwrap resulting in a corrupted iova.\n\nOpen code the ALIGN() using get_add_overflow() to prevent this.\nThis simplifies the checks as we don\u0027t need to check for length earlier\neither.\n\nConsolidate the two copies of this code under a single helper.\n\nThis bug would allow userspace to create a mapping that overlaps with some\nother mapping or a reserved range.",
  "id": "GHSA-4fjc-772g-jpj6",
  "modified": "2025-11-24T21:30:56Z",
  "published": "2025-09-05T18:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38688"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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