FKIE_CVE-2026-64549

Vulnerability from fkie_nvd - Published: 2026-07-27 21:17 - Updated: 2026-07-27 21:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/bpa10x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1813add71e386f77b3040e6c8dc9b7b3ff965a6c",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "bd56c23f1f8681a2857ee924a8bd3abf87c8913b",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "7a64f39ebe1bacd9004a62eceadac0b122ec3cc2",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "f80b4afe893dffa9fabdbf80fb4d6782b24a6793",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "4b4008dda1d0c6e598d7865631ad4eda63a560f0",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "bfc9e7be289df11e8e38c98cd78019d67fdd0bd5",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "a8e169d308775039200bb9c905c7ce420db6e8c5",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            },
            {
              "lessThan": "dd068ef044128db655f48323a4acfd5907e04903",
              "status": "affected",
              "version": "ddd68ec8f4847b460c9f580076eafe13b031a6fd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/bpa10x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "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"
            },
            {
              "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"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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."
    }
  ],
  "id": "CVE-2026-64549",
  "lastModified": "2026-07-27T21:17:07.720",
  "metrics": {},
  "published": "2026-07-27T21:17:07.720",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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