CVE-2025-40308 (GCVE-0-2025-40308)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46
VLAI?
Title
Bluetooth: bcsp: receive data only if registered
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bcsp: receive data only if registered Currently, bcsp_recv() can be called even when the BCSP protocol has not been registered. This leads to a NULL pointer dereference, as shown in the following stack trace: KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590 Call Trace: <TASK> hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627 tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f To prevent this, ensure that the HCI_UART_REGISTERED flag is set before processing received data. If the protocol is not registered, return -EUNATCH.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 39a7d40314b6288cfa2d13269275e9247a7a055a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 164586725b47f9d61912e6bf17dbaffeff11710b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8b892dbef3887dbe9afdc7176d1a5fd90e1636aa (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 799cd62cbcc3f12ee04b33ef390ff7d41c37d671 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b420a4c7f915fc1c94ad1f6ca740acc046d94334 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 55c1519fca830f59a10bbf9aa8209c87b06cf7bc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ca94b2b036c22556c3a66f1b80f490882deef7a6 (git)
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    Linux Linux Unaffected: 5.4.302 , ≤ 5.4.* (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_bcsp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "164586725b47f9d61912e6bf17dbaffeff11710b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
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              "status": "affected",
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_bcsp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.302",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.197",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.302",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.10.247",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.197",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.1.159",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.117",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.58",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "vulnerable": true
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                  "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: 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     \u003cTASK\u003e\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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:33.729Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/39a7d40314b6288cfa2d13269275e9247a7a055a"
        },
        {
          "url": "https://git.kernel.org/stable/c/164586725b47f9d61912e6bf17dbaffeff11710b"
        },
        {
          "url": "https://git.kernel.org/stable/c/b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b892dbef3887dbe9afdc7176d1a5fd90e1636aa"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/55c1519fca830f59a10bbf9aa8209c87b06cf7bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca94b2b036c22556c3a66f1b80f490882deef7a6"
        }
      ],
      "title": "Bluetooth: bcsp: receive data only if registered",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40308",
    "datePublished": "2025-12-08T00:46:33.729Z",
    "dateReserved": "2025-04-16T07:20:57.185Z",
    "dateUpdated": "2025-12-08T00:46:33.729Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40308\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-08T01:16:03.073\",\"lastModified\":\"2025-12-08T18:26:19.900\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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     \u003cTASK\u003e\\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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/164586725b47f9d61912e6bf17dbaffeff11710b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/39a7d40314b6288cfa2d13269275e9247a7a055a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/55c1519fca830f59a10bbf9aa8209c87b06cf7bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/799cd62cbcc3f12ee04b33ef390ff7d41c37d671\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b892dbef3887dbe9afdc7176d1a5fd90e1636aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b420a4c7f915fc1c94ad1f6ca740acc046d94334\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ca94b2b036c22556c3a66f1b80f490882deef7a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.



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