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't 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

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            metrics: [
               {
                  other: {
                     content: {
                        id: "CVE-2024-47676",
                        options: [
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                              Exploitation: "none",
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                           {
                              Automatable: "no",
                           },
                           {
                              "Technical Impact": "partial",
                           },
                        ],
                        role: "CISA Coordinator",
                        timestamp: "2024-10-21T13:07:59.972172Z",
                        version: "2.0.3",
                     },
                     type: "ssvc",
                  },
               },
            ],
            providerMetadata: {
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            },
            title: "CISA ADP Vulnrichment",
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                     status: "unaffected",
                     version: "6.11.2",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.12",
                     versionType: "original_commit_for_fix",
                  },
               ],
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         ],
         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't 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",
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   cveMetadata: {
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      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",
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}

All sightings related to this event Export sightings related to this event

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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