CVE-2026-53251 (GCVE-0-2026-53251)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-25 08:39
VLAI
Title
Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync hci_get_route() returns a reference-counted hci_dev pointer via hci_dev_hold(). The function exits normally or with an error without ever releasing it.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1360e5b6ce63d63d23223a659ca2bbafa30a53aa , < 4bbec25f47b930101294fd310c627c3f53e9661f (git)
Affected: 07a9342b94a91b306ed1cf6aa8254aea210764c9 , < 33d677d2e3713d98012c3dbd4a9207f7d785b854 (git)
Affected: 07a9342b94a91b306ed1cf6aa8254aea210764c9 , < 23e8eb16820b866528fb300dc67fe3f67f00ef62 (git)
Affected: 07a9342b94a91b306ed1cf6aa8254aea210764c9 , < 5cbf290b79351971f20c7a533247e8d58a3f970c (git)
Affected: bfec1e55314896bf4a4cfdb3a9ad4872be9f06ed (git)
Affected: 6.12.2 , < 6.12.94 (semver)
Affected: 6.11.11 , < 6.12 (semver)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (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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          "product": "Linux",
          "programFiles": [
            "net/bluetooth/iso.c"
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          "vendor": "Linux",
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              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync\n\nhci_get_route() returns a reference-counted hci_dev pointer via\nhci_dev_hold(). The function exits normally or with an error without ever\nreleasing it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-25T08:39:43.290Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4bbec25f47b930101294fd310c627c3f53e9661f"
        },
        {
          "url": "https://git.kernel.org/stable/c/33d677d2e3713d98012c3dbd4a9207f7d785b854"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/5cbf290b79351971f20c7a533247e8d58a3f970c"
        }
      ],
      "title": "Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53251",
    "datePublished": "2026-06-25T08:39:43.290Z",
    "dateReserved": "2026-06-09T07:44:35.394Z",
    "dateUpdated": "2026-06-25T08:39:43.290Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-07-02",
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      "percentile": "0.0723"
    },
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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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Nomenclature

  • 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.


Detection rules are retrieved from Rulezet.