{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-40308",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40308",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-08T00:46:33.729Z",
    "updatedAt": "2026-05-23T16:02:02.594Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Bluetooth: bcsp: receive data only if registered",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bcsp: receive data only if registered\n\nCurrently, bcsp_recv() can be called even when the BCSP protocol has not\nbeen registered. This leads to a NULL pointer dereference, as shown in\nthe following stack trace:\n\n    KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]\n    RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590\n    Call Trace:\n     <TASK>\n     hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627\n     tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290\n     tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706\n     vfs_ioctl fs/ioctl.c:51 [inline]\n     __do_sys_ioctl fs/ioctl.c:907 [inline]\n     __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\n     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n     do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\n     entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nTo prevent this, ensure that the HCI_UART_REGISTERED flag is set before\nprocessing received data. If the protocol is not registered, return\n-EUNATCH.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "48effdb7a798232db945503cf3f51e0be8070cea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "39a7d40314b6288cfa2d13269275e9247a7a055a"
            },
            {
              "version": "45fa7bd82c6178f4fec0ab94891144a043ec5fe8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "164586725b47f9d61912e6bf17dbaffeff11710b"
            },
            {
              "version": "d71a57a34ab6bbc95dc461158403c02e8ff3f912",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9"
            },
            {
              "version": "9cf7dccaa7f4c56d2089700e5cb11f85a8d5f6cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8b892dbef3887dbe9afdc7176d1a5fd90e1636aa"
            },
            {
              "version": "806464634e7fc6b523160defeeddb1ade2a72f81",
              "status": "affected",
              "versionType": "git",
              "lessThan": "799cd62cbcc3f12ee04b33ef390ff7d41c37d671"
            },
            {
              "version": "6b7a32fa9bacdebd98c18b2a56994116995ee643",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b420a4c7f915fc1c94ad1f6ca740acc046d94334"
            },
            {
              "version": "366ceff495f902182d42b6f41525c2474caf3f9a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "55c1519fca830f59a10bbf9aa8209c87b06cf7bc"
            },
            {
              "version": "366ceff495f902182d42b6f41525c2474caf3f9a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ca94b2b036c22556c3a66f1b80f490882deef7a6"
            },
            {
              "version": "15543b7bbe7b5f744fdbb44f75b14f81a0117813",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "a4b89a45b12b69bc82c8137346b150a118e02c26",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.4.293",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.302"
            },
            {
              "version": "5.10.237",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.247"
            },
            {
              "version": "5.15.181",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.197"
            },
            {
              "version": "6.1.135",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.159"
            },
            {
              "version": "6.6.88",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.117"
            },
            {
              "version": "6.12.24",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.58"
            },
            {
              "version": "6.13.12",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.14"
            },
            {
              "version": "6.14.3",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.15"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.15"
            },
            {
              "version": "5.4.302",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.247",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.197",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.159",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.117",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.58",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}