github - ghsa-4fjc-772g-jpj6

GHSA-4FJC-772G-JPJ6

Vulnerability from github – Published: 2025-09-05 18:31 – Updated: 2025-11-24 21:30

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.

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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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"
    }
  ]
}

CVE-2025-38688 (GCVE-0-2025-38688)

Vulnerability from cvelistv5 – Published: 2025-09-04 15:32 – Updated: 2025-09-29 05:56

Summary

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d19b817540c0abe84…
	https://git.kernel.org/stable/c/ebb6021560b94649b…
	https://git.kernel.org/stable/c/e42a046bb41dcdde4…
	https://git.kernel.org/stable/c/79fad1917802c28de…
	https://git.kernel.org/stable/c/b42497e3c0e74db06…

Impacted products

Vendor

Product

Version

Linux

Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < d19b817540c0abe84854a64ee9ee34cecc3bbeef (git)
Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < ebb6021560b94649bec6b8faba6fe0dca2218e81 (git)
Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < e42a046bb41dcdde4f766a17d8211842007ed537 (git)
Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < 79fad1917802c28de51a479318a056a6fbe3e2f2 (git)
Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < b42497e3c0e74db061eafad41c0cd7243c46436b (git)

Linux

Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/io_pagetable.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.6.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.43",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:56:02.884Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef"
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          "url": "https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81"
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        },
        {
          "url": "https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b"
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      ],
      "title": "iommufd: Prevent ALIGN() overflow",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38688",
    "datePublished": "2025-09-04T15:32:42.607Z",
    "dateReserved": "2025-04-16T04:51:24.032Z",
    "dateUpdated": "2025-09-29T05:56:02.884Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-4FJC-772G-JPJ6

CVE-2025-38688 (GCVE-0-2025-38688)

Tags

Sightings

Nomenclature