Vulnerability-Lookup

CVE-2026-64407 (GCVE-0-2026-64407)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50

Title

Bluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3() During the v3 firmware download the controller sends a v3_data_req with a 32 bit offset and a 16 bit len. nxp_recv_fw_req_v3() checks only the lower bound of the offset and then sends firmware from that offset. nxpdev->fw_dnld_v3_offset = offset - nxpdev->fw_v3_offset_correction; serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data + nxpdev->fw_dnld_v3_offset, len); Nothing checks that fw_dnld_v3_offset + len stays within nxpdev->fw->size, so a controller that asks for an offset or length past the firmware image makes the driver read past the end of nxpdev->fw->data and send that memory back over UART. nxp_recv_fw_req_v1() already bounds the same write. Add the equivalent check to the v3 path, reject the request when it falls outside the firmware image, and zero len on the error path so the fw_v3_prev_sent bookkeeping at free_skb stays consistent.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/21e60eb4d95854196…
https://git.kernel.org/stable/c/441088792ffec3ca0…
https://git.kernel.org/stable/c/2a68a773089204af1…
https://git.kernel.org/stable/c/49bcb39e3a041ce26…
https://git.kernel.org/stable/c/badff6c3bed8923a1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 689ca16e523278470c38832a3010645a78c544d8 , < 21e60eb4d95854196e7c0e77383f35e7ac95df61 (git) Affected: 689ca16e523278470c38832a3010645a78c544d8 , < 441088792ffec3ca01f4efe2934060570eb11eb8 (git) Affected: 689ca16e523278470c38832a3010645a78c544d8 , < 2a68a773089204af1c8581dc79668b775418c5ee (git) Affected: 689ca16e523278470c38832a3010645a78c544d8 , < 49bcb39e3a041ce26021f77971eaccb49a275118 (git) Affected: 689ca16e523278470c38832a3010645a78c544d8 , < badff6c3bed8923a1257a853f137d447976eec30 (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

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JSON

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{
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              "versionType": "semver"
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              "versionType": "semver"
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              "version": "6.18.39",
              "versionType": "semver"
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              "versionType": "semver"
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              "version": "7.2-rc3",
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      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()\n\nDuring the v3 firmware download the controller sends a v3_data_req with a\n32 bit offset and a 16 bit len. nxp_recv_fw_req_v3() checks only the lower\nbound of the offset and then sends firmware from that offset.\n\n  nxpdev-\u003efw_dnld_v3_offset = offset - nxpdev-\u003efw_v3_offset_correction;\n  serdev_device_write_buf(nxpdev-\u003eserdev, nxpdev-\u003efw-\u003edata +\n                          nxpdev-\u003efw_dnld_v3_offset, len);\n\nNothing checks that fw_dnld_v3_offset + len stays within nxpdev-\u003efw-\u003esize,\nso a controller that asks for an offset or length past the firmware image\nmakes the driver read past the end of nxpdev-\u003efw-\u003edata and send that\nmemory back over UART.\n\nnxp_recv_fw_req_v1() already bounds the same write. Add the equivalent\ncheck to the v3 path, reject the request when it falls outside the firmware\nimage, and zero len on the error path so the fw_v3_prev_sent bookkeeping at\nfree_skb stays consistent."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:48.912Z",
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        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/441088792ffec3ca01f4efe2934060570eb11eb8"
        },
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          "url": "https://git.kernel.org/stable/c/2a68a773089204af1c8581dc79668b775418c5ee"
        },
        {
          "url": "https://git.kernel.org/stable/c/49bcb39e3a041ce26021f77971eaccb49a275118"
        },
        {
          "url": "https://git.kernel.org/stable/c/badff6c3bed8923a1257a853f137d447976eec30"
        }
      ],
      "title": "Bluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64407",
    "datePublished": "2026-07-25T08:50:48.912Z",
    "dateReserved": "2026-07-19T15:36:31.786Z",
    "dateUpdated": "2026-07-25T08:50:48.912Z",
    "state": "PUBLISHED"
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      "percentile": "0.06413"
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    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:55Z",
      "cve": "CVE-2026-64407",
      "id": "CVE-2026-64407",
      "initial_release_date": "2026-07-25T15:59:55Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64407",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64407.json",
      "version": "2"
    }
  }
}

GHSA-VPWP-65CP-HGQM

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:

Bluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()

During the v3 firmware download the controller sends a v3_data_req with a 32 bit offset and a 16 bit len. nxp_recv_fw_req_v3() checks only the lower bound of the offset and then sends firmware from that offset.

nxpdev->fw_dnld_v3_offset = offset - nxpdev->fw_v3_offset_correction; serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data + nxpdev->fw_dnld_v3_offset, len);

Nothing checks that fw_dnld_v3_offset + len stays within nxpdev->fw->size, so a controller that asks for an offset or length past the firmware image makes the driver read past the end of nxpdev->fw->data and send that memory back over UART.

nxp_recv_fw_req_v1() already bounds the same write. Add the equivalent check to the v3 path, reject the request when it falls outside the firmware image, and zero len on the error path so the fw_v3_prev_sent bookkeeping at free_skb stays consistent.

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64407"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:24Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Fix out-of-bounds firmware read in nxp_recv_fw_req_v3()\n\nDuring the v3 firmware download the controller sends a v3_data_req with a\n32 bit offset and a 16 bit len. nxp_recv_fw_req_v3() checks only the lower\nbound of the offset and then sends firmware from that offset.\n\n  nxpdev-\u003efw_dnld_v3_offset = offset - nxpdev-\u003efw_v3_offset_correction;\n  serdev_device_write_buf(nxpdev-\u003eserdev, nxpdev-\u003efw-\u003edata +\n                          nxpdev-\u003efw_dnld_v3_offset, len);\n\nNothing checks that fw_dnld_v3_offset + len stays within nxpdev-\u003efw-\u003esize,\nso a controller that asks for an offset or length past the firmware image\nmakes the driver read past the end of nxpdev-\u003efw-\u003edata and send that\nmemory back over UART.\n\nnxp_recv_fw_req_v1() already bounds the same write. Add the equivalent\ncheck to the v3 path, reject the request when it falls outside the firmware\nimage, and zero len on the error path so the fw_v3_prev_sent bookkeeping at\nfree_skb stays consistent.",
  "id": "GHSA-vpwp-65cp-hgqm",
  "modified": "2026-07-25T12:31:34Z",
  "published": "2026-07-25T12:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64407"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21e60eb4d95854196e7c0e77383f35e7ac95df61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a68a773089204af1c8581dc79668b775418c5ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/441088792ffec3ca01f4efe2934060570eb11eb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49bcb39e3a041ce26021f77971eaccb49a275118"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/badff6c3bed8923a1257a853f137d447976eec30"
    }
  ],
  "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-2026-64407 (GCVE-0-2026-64407)

GHSA-VPWP-65CP-HGQM

Tags

Sightings

Nomenclature