CVE-2026-53253 (GCVE-0-2026-53253)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-28 06:40
VLAI
Title
Bluetooth: bnep: reject short frames before parsing
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: reject short frames before parsing A BNEP peer can send a short BNEP SDU. bnep_rx_frame() reads the packet type byte immediately and, for control packets, reads the control opcode and setup UUID-size byte before proving that those bytes are present. bnep_rx_control() also dereferences the control opcode without rejecting an empty control payload. Use skb_pull_data() for the fixed fields in bnep_rx_frame() so a NULL return gates each dereference. Split the control handler so the frame path can pass an opcode that has already been pulled, and keep the byte-buffer wrapper for extension control payloads. For BNEP_SETUP_CONN_REQ, name the UUID-size byte before pulling the setup payload. struct bnep_setup_conn_req carries destination and source service UUIDs after that byte, each uuid_size bytes, so the parser now documents that tuple explicitly instead of leaving the pull length as an opaque multiplication. Validation reproduced this kernel report: KASAN slab-out-of-bounds in bnep_rx_frame.isra.0+0x130c/0x1790 The buggy address belongs to the object at ffff88800c0f7908 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of allocated 1-byte region [ffff88800c0f7908, ffff88800c0f7909) Read of size 1 Call trace: dump_stack_lvl+0xb3/0x140 (?:?) print_address_description+0x57/0x3a0 (?:?) bnep_rx_frame+0x130c/0x1790 (net/bluetooth/bnep/core.c:306) print_report+0xb9/0x2b0 (?:?) __virt_addr_valid+0x1ba/0x3a0 (?:?) srso_alias_return_thunk+0x5/0xfbef5 (?:?) kasan_addr_to_slab+0x21/0x60 (?:?) kasan_report+0xe0/0x110 (?:?) process_one_work+0xfce/0x17e0 (kernel/workqueue.c:3200) worker_thread+0x65c/0xe40 (?:?) __kthread_parkme+0x184/0x230 (?:?) kthread+0x35e/0x470 (?:?) _raw_spin_unlock_irq+0x28/0x50 (?:?) ret_from_fork+0x586/0x870 (?:?) __switch_to+0x74f/0xdc0 (?:?) ret_from_fork_asm+0x1a/0x30 (?:?)
Severity
7.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0ef2ea86c82b2615902d085cd5a586fe9f58994f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2b83afb19293e4de700edae306115f18966dc4f9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 691f14b6a48b637655755134f1e551c7c6fedc2e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d76dec1a37122bc16d83d059c08c0512ea8de909 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c893e17d2809ec9c4b3f1cdd5847cecbc27a311b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < be837cd09897e9e6e1958174501d467bdcbcc2bc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6770d3a8acdf9151769180cc3710346c4cfbe6f0 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: reject short frames before parsing\n\nA BNEP peer can send a short BNEP SDU. bnep_rx_frame() reads the\npacket type byte immediately and, for control packets, reads the control\nopcode and setup UUID-size byte before proving that those bytes are\npresent. bnep_rx_control() also dereferences the control opcode without\nrejecting an empty control payload.\n\nUse skb_pull_data() for the fixed fields in bnep_rx_frame() so a NULL\nreturn gates each dereference. Split the control handler so the frame\npath can pass an opcode that has already been pulled, and keep the\nbyte-buffer wrapper for extension control payloads.\n\nFor BNEP_SETUP_CONN_REQ, name the UUID-size byte before pulling the\nsetup payload. struct bnep_setup_conn_req carries destination and source\nservice UUIDs after that byte, each uuid_size bytes, so the parser now\ndocuments that tuple explicitly instead of leaving the pull length as an\nopaque multiplication.\n\nValidation reproduced this kernel report:\nKASAN slab-out-of-bounds in bnep_rx_frame.isra.0+0x130c/0x1790\nThe buggy address belongs to the object at ffff88800c0f7908 which belongs\nto the cache kmalloc-8 of size 8\nThe buggy address is located 0 bytes to the right of allocated 1-byte\nregion [ffff88800c0f7908, ffff88800c0f7909)\nRead of size 1\nCall trace:\n  dump_stack_lvl+0xb3/0x140 (?:?)\n  print_address_description+0x57/0x3a0 (?:?)\n  bnep_rx_frame+0x130c/0x1790 (net/bluetooth/bnep/core.c:306)\n  print_report+0xb9/0x2b0 (?:?)\n  __virt_addr_valid+0x1ba/0x3a0 (?:?)\n  srso_alias_return_thunk+0x5/0xfbef5 (?:?)\n  kasan_addr_to_slab+0x21/0x60 (?:?)\n  kasan_report+0xe0/0x110 (?:?)\n  process_one_work+0xfce/0x17e0 (kernel/workqueue.c:3200)\n  worker_thread+0x65c/0xe40 (?:?)\n  __kthread_parkme+0x184/0x230 (?:?)\n  kthread+0x35e/0x470 (?:?)\n  _raw_spin_unlock_irq+0x28/0x50 (?:?)\n  ret_from_fork+0x586/0x870 (?:?)\n  __switch_to+0x74f/0xdc0 (?:?)\n  ret_from_fork_asm+0x1a/0x30 (?:?)"
        }
      ],
      "metrics": [
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            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-28T06:40:57.768Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ef2ea86c82b2615902d085cd5a586fe9f58994f"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b83afb19293e4de700edae306115f18966dc4f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/691f14b6a48b637655755134f1e551c7c6fedc2e"
        },
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          "url": "https://git.kernel.org/stable/c/d76dec1a37122bc16d83d059c08c0512ea8de909"
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          "url": "https://git.kernel.org/stable/c/c893e17d2809ec9c4b3f1cdd5847cecbc27a311b"
        },
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          "url": "https://git.kernel.org/stable/c/be837cd09897e9e6e1958174501d467bdcbcc2bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/6770d3a8acdf9151769180cc3710346c4cfbe6f0"
        }
      ],
      "title": "Bluetooth: bnep: reject short frames before parsing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53253",
    "datePublished": "2026-06-25T08:39:44.612Z",
    "dateReserved": "2026-06-09T07:44:35.394Z",
    "dateUpdated": "2026-06-28T06:40:57.768Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
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      "cve": "CVE-2026-53253",
      "date": "2026-07-01",
      "epss": "0.00274",
      "percentile": "0.19173"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53253\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-25T09:16:43.253\",\"lastModified\":\"2026-06-30T14:44:27.313\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: bnep: reject short frames before parsing\\n\\nA BNEP peer can send a short BNEP SDU. bnep_rx_frame() reads the\\npacket type byte immediately and, for control packets, reads the control\\nopcode and setup UUID-size byte before proving that those bytes are\\npresent. bnep_rx_control() also dereferences the control opcode without\\nrejecting an empty control payload.\\n\\nUse skb_pull_data() for the fixed fields in bnep_rx_frame() so a NULL\\nreturn gates each dereference. Split the control handler so the frame\\npath can pass an opcode that has already been pulled, and keep the\\nbyte-buffer wrapper for extension control payloads.\\n\\nFor BNEP_SETUP_CONN_REQ, name the UUID-size byte before pulling the\\nsetup payload. struct bnep_setup_conn_req carries destination and source\\nservice UUIDs after that byte, each uuid_size bytes, so the parser now\\ndocuments that tuple explicitly instead of leaving the pull length as an\\nopaque multiplication.\\n\\nValidation reproduced this kernel report:\\nKASAN slab-out-of-bounds in bnep_rx_frame.isra.0+0x130c/0x1790\\nThe buggy address belongs to the object at ffff88800c0f7908 which belongs\\nto the cache kmalloc-8 of size 8\\nThe buggy address is located 0 bytes to the right of allocated 1-byte\\nregion [ffff88800c0f7908, ffff88800c0f7909)\\nRead of size 1\\nCall trace:\\n  dump_stack_lvl+0xb3/0x140 (?:?)\\n  print_address_description+0x57/0x3a0 (?:?)\\n  bnep_rx_frame+0x130c/0x1790 (net/bluetooth/bnep/core.c:306)\\n  print_report+0xb9/0x2b0 (?:?)\\n  __virt_addr_valid+0x1ba/0x3a0 (?:?)\\n  srso_alias_return_thunk+0x5/0xfbef5 (?:?)\\n  kasan_addr_to_slab+0x21/0x60 (?:?)\\n  kasan_report+0xe0/0x110 (?:?)\\n  process_one_work+0xfce/0x17e0 (kernel/workqueue.c:3200)\\n  worker_thread+0x65c/0xe40 (?:?)\\n  __kthread_parkme+0x184/0x230 (?:?)\\n  kthread+0x35e/0x470 (?:?)\\n  _raw_spin_unlock_irq+0x28/0x50 (?:?)\\n  ret_from_fork+0x586/0x870 (?:?)\\n  __switch_to+0x74f/0xdc0 (?:?)\\n  ret_from_fork_asm+0x1a/0x30 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  }
}


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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.

Sightings

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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.
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  • 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.


Detection rules are retrieved from Rulezet.