github - ghsa-w3pr-pqpr-2f83

ghsa-w3pr-pqpr-2f83

Vulnerability from github

Published

2025-09-15 15:31

Modified

2025-09-15 15:31

Details

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

vfio/type1: prevent underflow of locked_vm via exec()

When a vfio container is preserved across exec, the task does not change, but it gets a new mm with locked_vm=0, and loses the count from existing dma mappings. If the user later unmaps a dma mapping, locked_vm underflows to a large unsigned value, and a subsequent dma map request fails with ENOMEM in __account_locked_vm.

To avoid underflow, grab and save the mm at the time a dma is mapped. Use that mm when adjusting locked_vm, rather than re-acquiring the saved task's mm, which may have changed. If the saved mm is dead, do nothing.

locked_vm is incremented for existing mappings in a subsequent patch.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53171"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T14:15:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/type1: prevent underflow of locked_vm via exec()\n\nWhen a vfio container is preserved across exec, the task does not change,\nbut it gets a new mm with locked_vm=0, and loses the count from existing\ndma mappings.  If the user later unmaps a dma mapping, locked_vm underflows\nto a large unsigned value, and a subsequent dma map request fails with\nENOMEM in __account_locked_vm.\n\nTo avoid underflow, grab and save the mm at the time a dma is mapped.\nUse that mm when adjusting locked_vm, rather than re-acquiring the saved\ntask\u0027s mm, which may have changed.  If the saved mm is dead, do nothing.\n\nlocked_vm is incremented for existing mappings in a subsequent patch.",
  "id": "GHSA-w3pr-pqpr-2f83",
  "modified": "2025-09-15T15:31:23Z",
  "published": "2025-09-15T15:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53171"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-53171 (GCVE-0-2023-53171)

Vulnerability from cvelistv5

Published

2025-09-15 14:04

Modified

2025-09-15 14:04

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: vfio/type1: prevent underflow of locked_vm via exec() When a vfio container is preserved across exec, the task does not change, but it gets a new mm with locked_vm=0, and loses the count from existing dma mappings. If the user later unmaps a dma mapping, locked_vm underflows to a large unsigned value, and a subsequent dma map request fails with ENOMEM in __account_locked_vm. To avoid underflow, grab and save the mm at the time a dma is mapped. Use that mm when adjusting locked_vm, rather than re-acquiring the saved task's mm, which may have changed. If the saved mm is dead, do nothing. locked_vm is incremented for existing mappings in a subsequent patch.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3
	https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7
	https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17
	https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b
	https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026

Impacted products

Vendor

Product

Version

▼

Linux

Version: 73fa0d10d077d9521ee2dace2307ae2c9a965336
Version: 73fa0d10d077d9521ee2dace2307ae2c9a965336
Version: 73fa0d10d077d9521ee2dace2307ae2c9a965336
Version: 73fa0d10d077d9521ee2dace2307ae2c9a965336
Version: 73fa0d10d077d9521ee2dace2307ae2c9a965336

Linux

Version: 3.6

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vfio/vfio_iommu_type1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5a271242716846cc016736fb76be2b40ee49b0c3",
              "status": "affected",
              "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
              "versionType": "git"
            },
            {
              "lessThan": "eafb81c50da899dd80b340c841277acc4a1945b7",
              "status": "affected",
              "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
              "versionType": "git"
            },
            {
              "lessThan": "a6b2aabe664098d5cf877ae0fd96459464a30e17",
              "status": "affected",
              "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
              "versionType": "git"
            },
            {
              "lessThan": "b0790dff0760b7734cf0961f497ad64628ca550b",
              "status": "affected",
              "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
              "versionType": "git"
            },
            {
              "lessThan": "046eca5018f8a5dd1dc2cedf87fb5843b9ea3026",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vfio/vfio_iommu_type1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "lessThan": "3.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.173",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.99",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.173",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.16",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.3",
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                }
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/type1: prevent underflow of locked_vm via exec()\n\nWhen a vfio container is preserved across exec, the task does not change,\nbut it gets a new mm with locked_vm=0, and loses the count from existing\ndma mappings.  If the user later unmaps a dma mapping, locked_vm underflows\nto a large unsigned value, and a subsequent dma map request fails with\nENOMEM in __account_locked_vm.\n\nTo avoid underflow, grab and save the mm at the time a dma is mapped.\nUse that mm when adjusting locked_vm, rather than re-acquiring the saved\ntask\u0027s mm, which may have changed.  If the saved mm is dead, do nothing.\n\nlocked_vm is incremented for existing mappings in a subsequent patch."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:04:04.544Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3"
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        },
        {
          "url": "https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026"
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      "title": "vfio/type1: prevent underflow of locked_vm via exec()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53171",
    "datePublished": "2025-09-15T14:04:04.544Z",
    "dateReserved": "2025-09-15T13:59:19.064Z",
    "dateUpdated": "2025-09-15T14:04:04.544Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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