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

Vulnerability from cvelistv5 – Published: 2026-07-27 20:10 – Updated: 2026-08-17 04:57
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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 , ≤ * (original_commit_for_fix)
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      "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:57:26.570Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b"
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        {
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        {
          "url": "https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0"
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        },
        {
          "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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    "datePublished": "2026-07-27T20:10:38.894Z",
    "dateReserved": "2026-07-19T15:36:31.795Z",
    "dateUpdated": "2026-08-17T04:57:26.570Z",
    "state": "PUBLISHED"
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            "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": "2026-08-17T05:18:00.267",
        "metrics": {},
        "published": "2026-07-27T21:17:07.720",
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            "url": "https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-08T13:04:01+00:00",
      "cve": "CVE-2026-64549",
      "id": "CVE-2026-64549",
      "initial_release_date": "2026-07-27T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64549.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:38:25Z",
      "cve": "CVE-2026-64549",
      "id": "CVE-2026-64549",
      "initial_release_date": "2026-07-28T17:07:56Z",
      "product_status:known_affected": "671",
      "product_status:known_not_affected": "62",
      "product_status:recommended": "111",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64549",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64549.json",
      "version": "11"
    }
  }
}



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