github - ghsa-7jh9-v3vw-v9px

ghsa-7jh9-v3vw-v9px

Vulnerability from github

Published

2024-10-21 12:30

Modified

2024-10-22 18:32

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:

mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway

Syzbot reports a UAF in hugetlb_fault(). This happens because vmf_anon_prepare() could drop the per-VMA lock and allow the current VMA to be freed before hugetlb_vma_unlock_read() is called.

We can fix this by using a modified version of vmf_anon_prepare() that doesn't release the VMA lock on failure, and then release it ourselves after hugetlb_vma_unlock_read().

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{
  "affected": [],
  "aliases": [
    "CVE-2024-47676"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T12:15:04Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb.c: fix UAF of vma in hugetlb fault pathway\n\nSyzbot reports a UAF in hugetlb_fault().  This happens because\nvmf_anon_prepare() could drop the per-VMA lock and allow the current VMA\nto be freed before hugetlb_vma_unlock_read() is called.\n\nWe can fix this by using a modified version of vmf_anon_prepare() that\ndoesn\u0027t release the VMA lock on failure, and then release it ourselves\nafter hugetlb_vma_unlock_read().",
  "id": "GHSA-7jh9-v3vw-v9px",
  "modified": "2024-10-22T18:32:09Z",
  "published": "2024-10-21T12:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47676"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776c"
    }
  ],
  "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-2024-47676

Vulnerability from cvelistv5

Published

2024-10-21 11:53

Modified

2024-12-19 09:25

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway Syzbot reports a UAF in hugetlb_fault(). This happens because vmf_anon_prepare() could drop the per-VMA lock and allow the current VMA to be freed before hugetlb_vma_unlock_read() is called. We can fix this by using a modified version of vmf_anon_prepare() that doesn't release the VMA lock on failure, and then release it ourselves after hugetlb_vma_unlock_read().

References

▼	URL	Tags
	https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776c
	https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876
	https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807

Impacted products

Vendor

Product

Version

▼

Linux

Version: 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c
Version: 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c
Version: 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c

Linux

Version: 6.9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-47676",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-21T13:07:59.972172Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-21T13:14:17.370Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e897d184a8dd4a4e1f39c8c495598e4d9472776c",
              "status": "affected",
              "version": "9acad7ba3e25d11f4c96df1b7312ae89e6faca5c",
              "versionType": "git"
            },
            {
              "lessThan": "d59ebc99dee0a2687a26df94b901eb8216dbf876",
              "status": "affected",
              "version": "9acad7ba3e25d11f4c96df1b7312ae89e6faca5c",
              "versionType": "git"
            },
            {
              "lessThan": "98b74bb4d7e96b4da5ef3126511febe55b76b807",
              "status": "affected",
              "version": "9acad7ba3e25d11f4c96df1b7312ae89e6faca5c",
              "versionType": "git"
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          ]
        },
        {
          "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": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb.c: fix UAF of vma in hugetlb fault pathway\n\nSyzbot reports a UAF in hugetlb_fault().  This happens because\nvmf_anon_prepare() could drop the per-VMA lock and allow the current VMA\nto be freed before hugetlb_vma_unlock_read() is called.\n\nWe can fix this by using a modified version of vmf_anon_prepare() that\ndoesn\u0027t release the VMA lock on failure, and then release it ourselves\nafter hugetlb_vma_unlock_read()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:25:36.643Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876"
        },
        {
          "url": "https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807"
        }
      ],
      "title": "mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47676",
    "datePublished": "2024-10-21T11:53:20.482Z",
    "dateReserved": "2024-09-30T16:00:12.938Z",
    "dateUpdated": "2024-12-19T09:25:36.643Z",
    "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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