CVE-2023-7356 (GCVE-0-2023-7356)

Vulnerability from cvelistv5 – Published: 2026-10-21 14:59 – Updated: 2026-10-24 14:08
VLAI
Title
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID Copy the content of a Periodic Advertisement Report to BASE only if the service UUID is Basic Audio Announcement Service UUID.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7056 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ba25efe15e8fd909884e113a86c6ccd07d88256e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 927ef409f713929dea2b9a5ed5bb65e712be0050 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f4da3ee15de9944482382181329bb6d7335ca003 (git)
Affected: 0 , < 6.1.178 (semver)
Affected: 0 , < 6.6.145 (semver)
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Linux Linux Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/iso.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ba25efe15e8fd909884e113a86c6ccd07d88256e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "927ef409f713929dea2b9a5ed5bb65e712be0050",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f4da3ee15de9944482382181329bb6d7335ca003",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/iso.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.7",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID\n\nCopy the content of a Periodic Advertisement Report to BASE only if\nthe service UUID is Basic Audio Announcement Service UUID."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - A BLE Periodic Advertising Report supplies ev3-\u003elength and ev3-\u003edata through hci_recv_frame()\u2192hci_event_packet()\u2192hci_le_per_adv_report_evt()\u2192hci_proto_connect_ind()\u2192iso_connect_ind(); exploitation therefore requires Bluetooth radio proximity.\nAC:L - A single matched report with length 251\u2013255 overwrites padding and up to five low bytes of iso_pinfo.conn; iso_connect_ind() performs the memcpy deterministically, with no race or condition outside the broadcaster\u0027s control.\nPR:N - hci_le_per_adv_report_evt() performs no pairing, authentication, or authorization check before calling iso_connect_ind(); iso_match_sync_handle_pa_report() only matches the unauthenticated report to an existing periodic-advertising sync.\nUI:N - Once an ISO broadcast-sink listener is synchronized, receipt of the crafted periodic report invokes iso_connect_ind() automatically; no victim action is required for the overflowing report.\nS:U - The overwrite corrupts iso_pinfo and its iso_conn pointer within the same host kernel security authority; it does not cross a VM, IOMMU, or other security boundary.\nC:H - base[248] immediately precedes the live conn pointer, and the overflow can redirect later conn-\u003ehcon reads in iso_sock_get_qos() and related paths, providing exploitable kernel-pointer corruption capable of arbitrary memory disclosure.\nI:H - The unchecked memcpy() writes beyond iso_pinfo.base into low bytes of iso_pinfo.conn; subsequent writes and lock operations through that corrupted pointer in iso_chan_del() and timer helpers can enable arbitrary kernel-memory corruption or control-flow hijacking.\nA:H - A corrupted iso_pinfo.conn is dereferenced by iso_sock_clear_timer(), iso_sock_get_qos(), send, and close paths, allowing an unauthenticated broadcaster to trigger a kernel oops or panic."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-24T14:08:33.775Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ba25efe15e8fd909884e113a86c6ccd07d88256e"
        },
        {
          "url": "https://git.kernel.org/stable/c/927ef409f713929dea2b9a5ed5bb65e712be0050"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4da3ee15de9944482382181329bb6d7335ca003"
        }
      ],
      "title": "Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-7356",
    "datePublished": "2026-10-21T14:59:38.724Z",
    "dateReserved": "2026-10-21T14:57:20.443Z",
    "dateUpdated": "2026-10-24T14:08:33.775Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-7356",
      "date": "2026-10-25",
      "epss": "0.00285",
      "percentile": "0.2086"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/bluetooth/iso.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "ba25efe15e8fd909884e113a86c6ccd07d88256e",
                    "status": "affected",
                    "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "927ef409f713929dea2b9a5ed5bb65e712be0050",
                    "status": "affected",
                    "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f4da3ee15de9944482382181329bb6d7335ca003",
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                    "versionType": "git"
                  },
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                    "version": "0",
                    "versionType": "semver"
                  },
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                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
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                ]
              },
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                "product": "Linux",
                "programFiles": [
                  "net/bluetooth/iso.c"
                ],
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                "vendor": "Linux",
                "versions": [
                  {
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                    "status": "unaffected",
                    "version": "6.1.178",
                    "versionType": "semver"
                  },
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                    "status": "unaffected",
                    "version": "6.6.145",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.7",
                    "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: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID\n\nCopy the content of a Periodic Advertisement Report to BASE only if\nthe service UUID is Basic Audio Announcement Service UUID."
          }
        ],
        "id": "CVE-2023-7356",
        "lastModified": "2026-10-24T14:16:37.647",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-21T15:17:12.440",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/927ef409f713929dea2b9a5ed5bb65e712be0050"
          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ba25efe15e8fd909884e113a86c6ccd07d88256e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f4da3ee15de9944482382181329bb6d7335ca003"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-10-24T14:22:37+00:00",
      "cve": "CVE-2023-7356",
      "id": "CVE-2023-7356",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "110",
      "product_status:known_not_affected": "168",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-7356.json",
      "version": "3"
    }
  }
}



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