Vulnerability-Lookup

GHSA-782Q-HRC8-FP6W

Vulnerability from github – Published: 2026-07-24 18:31 – Updated: 2026-07-27 06:30

Details

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

netfs: Fix overrun check in netfs_extract_user_iter()

Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.

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-2026-64217"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-24T16:16:49Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix overrun check in netfs_extract_user_iter()\n\nFix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills\npages[], then those pages don\u0027t get included in the iterator constructed at\nthe end of the function.  If there was an overfill, memory corruption has\nalready happened.",
  "id": "GHSA-782q-hrc8-fp6w",
  "modified": "2026-07-27T06:30:30Z",
  "published": "2026-07-24T18:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64217"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00efe58bbdcc93272d579ca24bfc912563f4a204"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/afeb32d9bf9aaeea51d0f723a19f14afb73bd94d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f48b9157f0f611fa436c360648603d5ded719b12"
    }
  ],
  "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-2026-64217 (GCVE-0-2026-64217)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:23 – Updated: 2026-07-27 04:58

Title

netfs: Fix overrun check in netfs_extract_user_iter()

Summary

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check in netfs_extract_user_iter() Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.

Severity

7.8 (High)


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

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/00efe58bbdcc93272…
https://git.kernel.org/stable/c/96cc3beb2390ba9f9…
https://git.kernel.org/stable/c/afeb32d9bf9aaeea5…
https://git.kernel.org/stable/c/f48b9157f0f611fa4…
https://git.kernel.org/stable/c/0ef37eef83fad3542…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < 00efe58bbdcc93272d579ca24bfc912563f4a204 (git) Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < 96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9 (git) Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < afeb32d9bf9aaeea51d0f723a19f14afb73bd94d (git) Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < f48b9157f0f611fa436c360648603d5ded719b12 (git) Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < 0ef37eef83fad3542ee06db2940433ae1a92b39d (git)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/iterator.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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            }
          ]
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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": "6.3"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "baseSeverity": "HIGH",
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-27T04:58:54.092Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39d"
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      ],
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64217",
    "datePublished": "2026-07-24T15:23:05.261Z",
    "dateReserved": "2026-07-19T15:36:31.770Z",
    "dateUpdated": "2026-07-27T04:58:54.092Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-782Q-HRC8-FP6W

CVE-2026-64217 (GCVE-0-2026-64217)

Tags

Sightings

Nomenclature