Vulnerability-Lookup

CVE-2026-64515 (GCVE-0-2026-64515)

Vulnerability from cvelistv5 – Published: 2026-07-25 09:14 – Updated: 2026-07-25 09:14

Title

wifi: mac80211: fix MLE defragmentation

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix MLE defragmentation If either reconf or EPCS multi-link element (MLE) is contained in a non-transmitted profile, the defragmentation routine is called with a pointer to the defragmented copy, but the original elements. This is incorrect for two reasons: - if the original defragmentation was needed, it will not find the correct data - if the original frame is at a higher address, the parsing will potentially overrun the heap data (though given the layout of the buffers, only into the new defragmentation buffer, and then it has to stop and fail once that's filled with copied data. Fix it by tracking the container along with the pointer and in doing so also unify the two almost identical defragmentation routines.

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/1f573e17bcb7275dd…
https://git.kernel.org/stable/c/55c479aae99b12048…
https://git.kernel.org/stable/c/722b3f86df8064446…
https://git.kernel.org/stable/c/a74e893f30db64cdc…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff , < 1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4 (git) Affected: 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff , < 55c479aae99b120489a432db9c717484e523dfd6 (git) Affected: 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff , < 722b3f86df80644463d29fe5451e30a617f74500 (git) Affected: 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff , < a74e893f30db64cdce0fc7a96d3baa417bcd55f5 (git)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (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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          "programFiles": [
            "net/mac80211/parse.c"
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              "versionType": "git"
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            {
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          "versions": [
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix MLE defragmentation\n\nIf either reconf or EPCS multi-link element (MLE) is contained in\na non-transmitted profile, the defragmentation routine is called\nwith a pointer to the defragmented copy, but the original elements.\n\nThis is incorrect for two reasons:\n - if the original defragmentation was needed, it will not find the\n   correct data\n - if the original frame is at a higher address, the parsing will\n   potentially overrun the heap data (though given the layout of\n   the buffers, only into the new defragmentation buffer, and then\n   it has to stop and fail once that\u0027s filled with copied data.\n\nFix it by tracking the container along with the pointer and in\ndoing so also unify the two almost identical defragmentation\nroutines."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T09:14:42.418Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4"
        },
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          "url": "https://git.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6"
        },
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          "url": "https://git.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500"
        },
        {
          "url": "https://git.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5"
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      ],
      "title": "wifi: mac80211: fix MLE defragmentation",
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    "cveId": "CVE-2026-64515",
    "datePublished": "2026-07-25T09:14:42.418Z",
    "dateReserved": "2026-07-19T15:36:31.793Z",
    "dateUpdated": "2026-07-25T09:14:42.418Z",
    "state": "PUBLISHED"
  },
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  }
}

GHSA-X6WQ-GX7F-G22H

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

wifi: mac80211: fix MLE defragmentation

If either reconf or EPCS multi-link element (MLE) is contained in a non-transmitted profile, the defragmentation routine is called with a pointer to the defragmented copy, but the original elements.

This is incorrect for two reasons: - if the original defragmentation was needed, it will not find the correct data - if the original frame is at a higher address, the parsing will potentially overrun the heap data (though given the layout of the buffers, only into the new defragmentation buffer, and then it has to stop and fail once that's filled with copied data.

Fix it by tracking the container along with the pointer and in doing so also unify the two almost identical defragmentation routines.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64515"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix MLE defragmentation\n\nIf either reconf or EPCS multi-link element (MLE) is contained in\na non-transmitted profile, the defragmentation routine is called\nwith a pointer to the defragmented copy, but the original elements.\n\nThis is incorrect for two reasons:\n - if the original defragmentation was needed, it will not find the\n   correct data\n - if the original frame is at a higher address, the parsing will\n   potentially overrun the heap data (though given the layout of\n   the buffers, only into the new defragmentation buffer, and then\n   it has to stop and fail once that\u0027s filled with copied data.\n\nFix it by tracking the container along with the pointer and in\ndoing so also unify the two almost identical defragmentation\nroutines.",
  "id": "GHSA-x6wq-gx7f-g22h",
  "modified": "2026-07-25T12:31:39Z",
  "published": "2026-07-25T12:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64515"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

CVE-2026-64515 (GCVE-0-2026-64515)

GHSA-X6WQ-GX7F-G22H

Tags

Sightings

Nomenclature