CVE-2022-48947 (GCVE-0-2022-48947)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:05 – Updated: 2026-05-11 18:50
VLAI
Title
Bluetooth: L2CAP: Fix u8 overflow
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix u8 overflow By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases multiple times and eventually it will wrap around the maximum number (i.e., 255). This patch prevents this by adding a boundary check with L2CAP_MAX_CONF_RSP Btmon log: Bluetooth monitor ver 5.64 = Note: Linux version 6.1.0-rc2 (x86_64) 0.264594 = Note: Bluetooth subsystem version 2.22 0.264636 @ MGMT Open: btmon (privileged) version 1.22 {0x0001} 0.272191 = New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0) [hci0] 13.877604 @ RAW Open: 9496 (privileged) version 2.22 {0x0002} 13.890741 = Open Index: 00:00:00:00:00:00 [hci0] 13.900426 (...) > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 14.273106 invalid packet size (12 != 1033) 08 00 01 00 02 01 04 00 01 10 ff ff ............ > ACL Data RX: Handle 200 flags 0x00 dlen 1547 #33 [hci0] 14.273561 invalid packet size (14 != 1547) 0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@..... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #34 [hci0] 14.274390 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@....... > ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 14.274932 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@....... = bluetoothd: Bluetooth daemon 5.43 14.401828 > ACL Data RX: Handle 200 flags 0x00 dlen 1033 #36 [hci0] 14.275753 invalid packet size (12 != 1033) 08 00 01 00 04 01 04 00 40 00 00 00 ........@...
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:22 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < 49d5867819ab7c744852b45509e8469839c07e0e (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < 95f1847a361c7b4bf7d74c06ecb6968455082c1a (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < ad528fde0702903208d0a79d88d5a42ae3fc235b (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < 9fdc79b571434af7bc742da40a3405f038b637a7 (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < f3fe6817156a2ad4b06f01afab04638a34d7c9a6 (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < 19a78143961a197de8502f4f29c453b913dc3c29 (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < 5550bbf709c323194881737fd290c4bada9e6ead (git)
Affected: f2fcfcd670257236ebf2088bbdf26f6a8ef459fe , < bcd70260ef56e0aee8a4fc6cd214a419900b0765 (git)
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Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.161 , ≤ 5.10.* (semver)
Unaffected: 5.15.85 , ≤ 5.15.* (semver)
Unaffected: 6.0.15 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix u8 overflow\n\nBy keep sending L2CAP_CONF_REQ packets, chan-\u003enum_conf_rsp increases\nmultiple times and eventually it will wrap around the maximum number\n(i.e., 255).\nThis patch prevents this by adding a boundary check with\nL2CAP_MAX_CONF_RSP\n\nBtmon log:\nBluetooth monitor ver 5.64\n= Note: Linux version 6.1.0-rc2 (x86_64)                               0.264594\n= Note: Bluetooth subsystem version 2.22                               0.264636\n@ MGMT Open: btmon (privileged) version 1.22                  {0x0001} 0.272191\n= New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0)          [hci0] 13.877604\n@ RAW Open: 9496 (privileged) version 2.22                   {0x0002} 13.890741\n= Open Index: 00:00:00:00:00:00                                [hci0] 13.900426\n(...)\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1033             #32 [hci0] 14.273106\n        invalid packet size (12 != 1033)\n        08 00 01 00 02 01 04 00 01 10 ff ff              ............\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1547             #33 [hci0] 14.273561\n        invalid packet size (14 != 1547)\n        0a 00 01 00 04 01 06 00 40 00 00 00 00 00        ........@.....\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 2061             #34 [hci0] 14.274390\n        invalid packet size (16 != 2061)\n        0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04  ........@.......\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 2061             #35 [hci0] 14.274932\n        invalid packet size (16 != 2061)\n        0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00  ........@.......\n= bluetoothd: Bluetooth daemon 5.43                                   14.401828\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1033             #36 [hci0] 14.275753\n        invalid packet size (12 != 1033)\n        08 00 01 00 04 01 04 00 40 00 00 00              ........@..."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: L2CAP: Corregir desbordamiento de u8 Al seguir enviando paquetes L2CAP_CONF_REQ, chan-\u0026gt;num_conf_rsp aumenta varias veces y eventualmente alcanzar\u00e1 el n\u00famero m\u00e1ximo (es decir, 255). Este parche evita esto a\u00f1adiendo una comprobaci\u00f3n de los l\u00edmites con L2CAP_MAX_CONF_RSP Btmon log: Bluetooth monitor ver 5.64 = Nota: Linux versi\u00f3n 6.1.0-rc2 (x86_64) 0.264594 = Nota: Subsistema Bluetooth versi\u00f3n 2.22 0.264636 @ MGMT Open: btmon (privilegiado) versi\u00f3n 1.22 {0x0001} 0.272191 = Nuevo \u00edndice: 00:00:00:00:00:00 (Principal,Virtual,hci0) [hci0] 13.877604 @ RAW Open: 9496 (privilegiado) versi\u00f3n 2.22 {0x0002} 13.890741 = Abierto \u00cdndice: 00:00:00:00:00:00 [hci0] 13.900426 (...) \u0026gt; ACL Data RX: Manejar 200 indicadores 0x00 dlen 1033 #32 [hci0] 14.273106 tama\u00f1o de paquete no v\u00e1lido (12 != 1033) 08 00 01 00 02 01 04 00 01 10 ff ff ............ \u0026gt; ACL Data RX: Manejar 200 indicadores 0x00 dlen 1547 #33 [hci0] 14.273561 tama\u00f1o de paquete no v\u00e1lido (14 != 1547) 0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@..... \u0026gt; ACL Data RX: Manejar 200 indicadores 0x00 dlen 2061 #34 [hci0] 14.274390 tama\u00f1o de paquete no v\u00e1lido (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@....... \u0026gt; ACL Data RX: Manejar 200 indicadores 0x00 dlen 2061 #35 [hci0] 14.274932 tama\u00f1o de paquete no v\u00e1lido (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@....... = bluetoothd: Daemon Bluetooth 5.43 14.401828 \u0026gt; ACL Data RX: Manejar 200 indicadores 0x00 dlen 1033 #36 [hci0] 14.275753 tama\u00f1o de paquete no v\u00e1lido (12 != 1033) 08 00 01 00 04 01 04 00 40 00 00 00 ........@..."
          }
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        "id": "CVE-2022-48947",
        "lastModified": "2026-06-17T05:16:41.207",
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      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:00:44+00:00",
      "cve": "CVE-2022-48947",
      "id": "CVE-2022-48947",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "1043",
      "product_status:known_affected": "66",
      "product_status:known_not_affected": "70",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: L2CAP: Fix u8 overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48947.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:32:19Z",
      "cve": "CVE-2022-48947",
      "id": "CVE-2022-48947",
      "initial_release_date": "2024-10-22T14:23:29Z",
      "product_status:known_affected": "24",
      "product_status:known_not_affected": "302",
      "product_status:recommended": "502",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-48947",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-48947.json",
      "version": "40"
    },
    "vulnrichment": {
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              {
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                    "id": "CVE-2022-48947",
                    "options": [
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                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-10-22T13:22:07.757358Z",
                    "version": "2.0.3"
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              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
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            },
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              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "2.6.32"
                },
                {
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
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                  "status": "unaffected",
                  "version": "4.9.337",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.14.*",
                  "status": "unaffected",
                  "version": "4.14.303",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.270",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.229",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.161",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.85",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.0.*",
                  "status": "unaffected",
                  "version": "6.0.15",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.1",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
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              "nodes": [
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                      "vulnerable": true
                    },
                    {
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          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix u8 overflow\n\nBy keep sending L2CAP_CONF_REQ packets, chan-\u003enum_conf_rsp increases\nmultiple times and eventually it will wrap around the maximum number\n(i.e., 255).\nThis patch prevents this by adding a boundary check with\nL2CAP_MAX_CONF_RSP\n\nBtmon log:\nBluetooth monitor ver 5.64\n= Note: Linux version 6.1.0-rc2 (x86_64)                               0.264594\n= Note: Bluetooth subsystem version 2.22                               0.264636\n@ MGMT Open: btmon (privileged) version 1.22                  {0x0001} 0.272191\n= New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0)          [hci0] 13.877604\n@ RAW Open: 9496 (privileged) version 2.22                   {0x0002} 13.890741\n= Open Index: 00:00:00:00:00:00                                [hci0] 13.900426\n(...)\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1033             #32 [hci0] 14.273106\n        invalid packet size (12 != 1033)\n        08 00 01 00 02 01 04 00 01 10 ff ff              ............\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1547             #33 [hci0] 14.273561\n        invalid packet size (14 != 1547)\n        0a 00 01 00 04 01 06 00 40 00 00 00 00 00        ........@.....\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 2061             #34 [hci0] 14.274390\n        invalid packet size (16 != 2061)\n        0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04  ........@.......\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 2061             #35 [hci0] 14.274932\n        invalid packet size (16 != 2061)\n        0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00  ........@.......\n= bluetoothd: Bluetooth daemon 5.43                                   14.401828\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1033             #36 [hci0] 14.275753\n        invalid packet size (12 != 1033)\n        08 00 01 00 04 01 04 00 40 00 00 00              ........@..."
            }
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          "providerMetadata": {
            "dateUpdated": "2025-12-23T13:21:14.514Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/49d5867819ab7c744852b45509e8469839c07e0e"
            },
            {
              "url": "https://git.kernel.org/stable/c/95f1847a361c7b4bf7d74c06ecb6968455082c1a"
            },
            {
              "url": "https://git.kernel.org/stable/c/ad528fde0702903208d0a79d88d5a42ae3fc235b"
            },
            {
              "url": "https://git.kernel.org/stable/c/9fdc79b571434af7bc742da40a3405f038b637a7"
            },
            {
              "url": "https://git.kernel.org/stable/c/f3fe6817156a2ad4b06f01afab04638a34d7c9a6"
            },
            {
              "url": "https://git.kernel.org/stable/c/19a78143961a197de8502f4f29c453b913dc3c29"
            },
            {
              "url": "https://git.kernel.org/stable/c/5550bbf709c323194881737fd290c4bada9e6ead"
            },
            {
              "url": "https://git.kernel.org/stable/c/bcd70260ef56e0aee8a4fc6cd214a419900b0765"
            }
          ],
          "title": "Bluetooth: L2CAP: Fix u8 overflow",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48947",
        "datePublished": "2024-10-21T20:05:36.491Z",
        "dateReserved": "2024-08-22T01:27:53.624Z",
        "dateUpdated": "2025-12-23T13:21:14.514Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.