CVE-2026-53252 (GCVE-0-2026-53252)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-25 08:39
VLAI
Title
Bluetooth: fix memory leak in error path of hci_alloc_dev()
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix memory leak in error path of hci_alloc_dev() Early failures in Bluetooth HCI UART configuration leak SRCU percpu memory. When device initialization fails before hci_register_dev() completes, the HCI_UNREGISTER flag is never set. As a result, when the device reference count reaches zero, bt_host_release() evaluates this flag as false and falls back to a direct kfree(hdev). Because hci_release_dev() is bypassed, the SRCU struct initialized early in hci_alloc_dev() is never cleaned up, resulting in a leak of percpu memory. Fix the leak by explicitly calling cleanup_srcu_struct() in the fallback (unregistered) branch of bt_host_release() before freeing the device.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 90dee0a0ff84fac8accd5be98412b3819f667149 , < 5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd (git)
Affected: c56b177efce8b62798e4d96bdb9867106cb7c4a0 , < c016118b9e51eeaf5bc93850d4c455a3b583c0aa (git)
Affected: bc0819a25e04cd68ef3568cfa51b63118fea39a7 , < 0622e527a31d4b44737fed5c1a2ac1fc2cfb5184 (git)
Affected: ce23b73f0f27e2dbeb81734a79db710f05aa33c6 , < bc2efe73c194a74839d7cf57b63880d97e21d309 (git)
Affected: 1d6123102e9fbedc8d25bf4731da6d513173e49e , < ce4b4cac3c5749b6aa75e62e2991ae2263f2f889 (git)
Affected: 1d6123102e9fbedc8d25bf4731da6d513173e49e , < f82799407a50af7bcacacf09cc9b279af8fe9b81 (git)
Affected: 1d6123102e9fbedc8d25bf4731da6d513173e49e , < 37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f (git)
Affected: dd4becd3fd4102696e1c15e6d260a1712a2d8685 (git)
Affected: 0e5c144c557df910ab64d9c25d06399a9a735e65 (git)
Affected: 5.15.209 , < 5.15.210 (semver)
Affected: 6.1.167 , < 6.1.176 (semver)
Affected: 6.6.97 , < 6.6.143 (semver)
Affected: 6.12.36 , < 6.12.94 (semver)
Affected: 5.10.259 , < 5.11 (semver)
Affected: 6.15.5 , < 6.16 (semver)
Create a notification for this product.
Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (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)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd",
              "status": "affected",
              "version": "90dee0a0ff84fac8accd5be98412b3819f667149",
              "versionType": "git"
            },
            {
              "lessThan": "c016118b9e51eeaf5bc93850d4c455a3b583c0aa",
              "status": "affected",
              "version": "c56b177efce8b62798e4d96bdb9867106cb7c4a0",
              "versionType": "git"
            },
            {
              "lessThan": "0622e527a31d4b44737fed5c1a2ac1fc2cfb5184",
              "status": "affected",
              "version": "bc0819a25e04cd68ef3568cfa51b63118fea39a7",
              "versionType": "git"
            },
            {
              "lessThan": "bc2efe73c194a74839d7cf57b63880d97e21d309",
              "status": "affected",
              "version": "ce23b73f0f27e2dbeb81734a79db710f05aa33c6",
              "versionType": "git"
            },
            {
              "lessThan": "ce4b4cac3c5749b6aa75e62e2991ae2263f2f889",
              "status": "affected",
              "version": "1d6123102e9fbedc8d25bf4731da6d513173e49e",
              "versionType": "git"
            },
            {
              "lessThan": "f82799407a50af7bcacacf09cc9b279af8fe9b81",
              "status": "affected",
              "version": "1d6123102e9fbedc8d25bf4731da6d513173e49e",
              "versionType": "git"
            },
            {
              "lessThan": "37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f",
              "status": "affected",
              "version": "1d6123102e9fbedc8d25bf4731da6d513173e49e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "dd4becd3fd4102696e1c15e6d260a1712a2d8685",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0e5c144c557df910ab64d9c25d06399a9a735e65",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.210",
              "status": "affected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.176",
              "status": "affected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.143",
              "status": "affected",
              "version": "6.6.97",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.94",
              "status": "affected",
              "version": "6.12.36",
              "versionType": "semver"
            },
            {
              "lessThan": "5.11",
              "status": "affected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.5",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.210",
                  "versionStartIncluding": "5.15.209",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.176",
                  "versionStartIncluding": "6.1.167",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.143",
                  "versionStartIncluding": "6.6.97",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.94",
                  "versionStartIncluding": "6.12.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.36",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.259",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.15.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix memory leak in error path of hci_alloc_dev()\n\nEarly failures in Bluetooth HCI UART configuration leak SRCU percpu\nmemory.\n\nWhen device initialization fails before hci_register_dev() completes,\nthe HCI_UNREGISTER flag is never set. As a result, when the device\nreference count reaches zero, bt_host_release() evaluates this flag as\nfalse and falls back to a direct kfree(hdev).\n\nBecause hci_release_dev() is bypassed, the SRCU struct initialized\nearly in hci_alloc_dev() is never cleaned up, resulting in a leak of\npercpu memory.\n\nFix the leak by explicitly calling cleanup_srcu_struct() in the\nfallback (unregistered) branch of bt_host_release() before freeing\nthe device."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-25T08:39:43.951Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889"
        },
        {
          "url": "https://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81"
        },
        {
          "url": "https://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f"
        }
      ],
      "title": "Bluetooth: fix memory leak in error path of hci_alloc_dev()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53252",
    "datePublished": "2026-06-25T08:39:43.951Z",
    "dateReserved": "2026-06-09T07:44:35.394Z",
    "dateUpdated": "2026-06-25T08:39:43.951Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53252",
      "date": "2026-07-01",
      "epss": "0.00189",
      "percentile": "0.08726"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53252\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-25T09:16:43.137\",\"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: fix memory leak in error path of hci_alloc_dev()\\n\\nEarly failures in Bluetooth HCI UART configuration leak SRCU percpu\\nmemory.\\n\\nWhen device initialization fails before hci_register_dev() completes,\\nthe HCI_UNREGISTER flag is never set. As a result, when the device\\nreference count reaches zero, bt_host_release() evaluates this flag as\\nfalse and falls back to a direct kfree(hdev).\\n\\nBecause hci_release_dev() is bypassed, the SRCU struct initialized\\nearly in hci_alloc_dev() is never cleaned up, resulting in a leak of\\npercpu memory.\\n\\nFix the leak by explicitly calling cleanup_srcu_struct() in the\\nfallback (unregistered) branch of bt_host_release() before freeing\\nthe device.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/bluetooth/hci_sysfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"90dee0a0ff84fac8accd5be98412b3819f667149\",\"lessThan\":\"5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c56b177efce8b62798e4d96bdb9867106cb7c4a0\",\"lessThan\":\"c016118b9e51eeaf5bc93850d4c455a3b583c0aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc0819a25e04cd68ef3568cfa51b63118fea39a7\",\"lessThan\":\"0622e527a31d4b44737fed5c1a2ac1fc2cfb5184\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce23b73f0f27e2dbeb81734a79db710f05aa33c6\",\"lessThan\":\"bc2efe73c194a74839d7cf57b63880d97e21d309\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1d6123102e9fbedc8d25bf4731da6d513173e49e\",\"lessThan\":\"ce4b4cac3c5749b6aa75e62e2991ae2263f2f889\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1d6123102e9fbedc8d25bf4731da6d513173e49e\",\"lessThan\":\"f82799407a50af7bcacacf09cc9b279af8fe9b81\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1d6123102e9fbedc8d25bf4731da6d513173e49e\",\"lessThan\":\"37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dd4becd3fd4102696e1c15e6d260a1712a2d8685\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0e5c144c557df910ab64d9c25d06399a9a735e65\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.15.209\",\"lessThan\":\"5.15.210\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.167\",\"lessThan\":\"6.1.176\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.97\",\"lessThan\":\"6.6.143\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.36\",\"lessThan\":\"6.12.94\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.259\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.15.5\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/bluetooth/hci_sysfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.94\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.36\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.