Vulnerability-Lookup

CVE-2026-64549 (GCVE-0-2026-64549)

Vulnerability from cvelistv5 – Published: 2026-07-27 20:10 – Updated: 2026-07-27 20:10

Title

Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup() bpa10x_setup() sends the vendor command 0xfc0e and passes the response to bt_dev_info() and hci_set_fw_info() as a "%s" string starting at skb->data + 1, without checking the length: bt_dev_info(hdev, "%s", (char *)(skb->data + 1)); hci_set_fw_info(hdev, "%s", skb->data + 1); A device that returns a one-byte response (status only) leaves skb->data + 1 past the end of the data, and the %s walk reads adjacent slab memory until it meets a NUL. The same happens when the payload is not NUL-terminated within skb->len. The out-of-bounds bytes end up in the kernel log and the firmware-info debugfs file. Print the revision string with a bounded "%.*s" limited to skb->len - 1 instead. This keeps the string readable for well-behaved devices while never reading past the received data, and does not fail setup, so a device returning a short or unterminated response keeps working.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/1813add71e386f77b…
https://git.kernel.org/stable/c/bd56c23f1f8681a28…
https://git.kernel.org/stable/c/7a64f39ebe1bacd90…
https://git.kernel.org/stable/c/f80b4afe893dffa9f…
https://git.kernel.org/stable/c/4b4008dda1d0c6e59…
https://git.kernel.org/stable/c/bfc9e7be289df11e8…
https://git.kernel.org/stable/c/a8e169d3087750392…
https://git.kernel.org/stable/c/dd068ef044128db65…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < 1813add71e386f77b3040e6c8dc9b7b3ff965a6c (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < bd56c23f1f8681a2857ee924a8bd3abf87c8913b (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < 7a64f39ebe1bacd9004a62eceadac0b122ec3cc2 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < f80b4afe893dffa9fabdbf80fb4d6782b24a6793 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < 4b4008dda1d0c6e598d7865631ad4eda63a560f0 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < bfc9e7be289df11e8e38c98cd78019d67fdd0bd5 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < a8e169d308775039200bb9c905c7ce420db6e8c5 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < dd068ef044128db655f48323a4acfd5907e04903 (git)
Linux	Linux	Affected: 4.4 Unaffected: 0 , < 4.4 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/bpa10x.c"
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            {
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              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
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              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                  "vulnerable": true
                },
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                  "versionEndExcluding": "7.2-rc3",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()\n\nbpa10x_setup() sends the vendor command 0xfc0e and passes the response\nto bt_dev_info() and hci_set_fw_info() as a \"%s\" string starting at\nskb-\u003edata + 1, without checking the length:\n\n\tbt_dev_info(hdev, \"%s\", (char *)(skb-\u003edata + 1));\n\thci_set_fw_info(hdev, \"%s\", skb-\u003edata + 1);\n\nA device that returns a one-byte response (status only) leaves\nskb-\u003edata + 1 past the end of the data, and the %s walk reads adjacent\nslab memory until it meets a NUL. The same happens when the payload is\nnot NUL-terminated within skb-\u003elen. The out-of-bounds bytes end up in\nthe kernel log and the firmware-info debugfs file.\n\nPrint the revision string with a bounded \"%.*s\" limited to skb-\u003elen - 1\ninstead. This keeps the string readable for well-behaved devices while\nnever reading past the received data, and does not fail setup, so a\ndevice returning a short or unterminated response keeps working."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-27T20:10:38.894Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2"
        },
        {
          "url": "https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903"
        }
      ],
      "title": "Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64549",
    "datePublished": "2026-07-27T20:10:38.894Z",
    "dateReserved": "2026-07-19T15:36:31.795Z",
    "dateUpdated": "2026-07-27T20:10:38.894Z",
    "state": "PUBLISHED"
  },
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64549\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-27T21:17:07.720\",\"lastModified\":\"2026-07-27T21:17:07.720\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()\\n\\nbpa10x_setup() sends the vendor command 0xfc0e and passes the response\\nto bt_dev_info() and hci_set_fw_info() as a \\\"%s\\\" string starting at\\nskb-\u003edata + 1, without checking the length:\\n\\n\\tbt_dev_info(hdev, \\\"%s\\\", (char *)(skb-\u003edata + 1));\\n\\thci_set_fw_info(hdev, \\\"%s\\\", skb-\u003edata + 1);\\n\\nA device that returns a one-byte response (status only) leaves\\nskb-\u003edata + 1 past the end of the data, and the %s walk reads adjacent\\nslab memory until it meets a NUL. The same happens when the payload is\\nnot NUL-terminated within skb-\u003elen. The out-of-bounds bytes end up in\\nthe kernel log and the firmware-info debugfs file.\\n\\nPrint the revision string with a bounded \\\"%.*s\\\" limited to skb-\u003elen - 1\\ninstead. This keeps the string readable for well-behaved devices while\\nnever reading past the received data, and does not fail setup, so a\\ndevice returning a short or unterminated response keeps working.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/bluetooth/bpa10x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"1813add71e386f77b3040e6c8dc9b7b3ff965a6c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"bd56c23f1f8681a2857ee924a8bd3abf87c8913b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"7a64f39ebe1bacd9004a62eceadac0b122ec3cc2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"f80b4afe893dffa9fabdbf80fb4d6782b24a6793\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"4b4008dda1d0c6e598d7865631ad4eda63a560f0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"bfc9e7be289df11e8e38c98cd78019d67fdd0bd5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"a8e169d308775039200bb9c905c7ce420db6e8c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ddd68ec8f4847b460c9f580076eafe13b031a6fd\",\"lessThan\":\"dd068ef044128db655f48323a4acfd5907e04903\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/bluetooth/bpa10x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-4PQ4-7M8R-FRPC

Vulnerability from github – Published: 2026-07-27 21:31 – Updated: 2026-07-27 21:31

Details

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

Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()

bpa10x_setup() sends the vendor command 0xfc0e and passes the response to bt_dev_info() and hci_set_fw_info() as a "%s" string starting at skb->data + 1, without checking the length:

bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
hci_set_fw_info(hdev, "%s", skb->data + 1);

A device that returns a one-byte response (status only) leaves skb->data + 1 past the end of the data, and the %s walk reads adjacent slab memory until it meets a NUL. The same happens when the payload is not NUL-terminated within skb->len. The out-of-bounds bytes end up in the kernel log and the firmware-info debugfs file.

Print the revision string with a bounded "%.*s" limited to skb->len - 1 instead. This keeps the string readable for well-behaved devices while never reading past the received data, and does not fail setup, so a device returning a short or unterminated response keeps working.

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64549"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-27T21:17:07Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()\n\nbpa10x_setup() sends the vendor command 0xfc0e and passes the response\nto bt_dev_info() and hci_set_fw_info() as a \"%s\" string starting at\nskb-\u003edata + 1, without checking the length:\n\n\tbt_dev_info(hdev, \"%s\", (char *)(skb-\u003edata + 1));\n\thci_set_fw_info(hdev, \"%s\", skb-\u003edata + 1);\n\nA device that returns a one-byte response (status only) leaves\nskb-\u003edata + 1 past the end of the data, and the %s walk reads adjacent\nslab memory until it meets a NUL. The same happens when the payload is\nnot NUL-terminated within skb-\u003elen. The out-of-bounds bytes end up in\nthe kernel log and the firmware-info debugfs file.\n\nPrint the revision string with a bounded \"%.*s\" limited to skb-\u003elen - 1\ninstead. This keeps the string readable for well-behaved devices while\nnever reading past the received data, and does not fail setup, so a\ndevice returning a short or unterminated response keeps working.",
  "id": "GHSA-4pq4-7m8r-frpc",
  "modified": "2026-07-27T21:31:26Z",
  "published": "2026-07-27T21:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64549"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793"
    }
  ],
  "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-2026-64549 (GCVE-0-2026-64549)

GHSA-4PQ4-7M8R-FRPC

Tags

Sightings

Nomenclature