Bluetooth: ISO: release unused CIS holds after channel attach

{
  "id": "112e9ae3aedc122f2fde599129c6ed6d739a73d8720a6788b0788c924fa83a35",
  "url": "https://osv.dev/vulnerability/CVE-2026-98458",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: ISO: release unused CIS holds after channel attach",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: release unused CIS holds after channel attach hci_bind_cis() and hci_connect_cis() return one hci_conn hold for the ISO layer. A new channel association consumes that hold, which is eventually released by iso_conn_free(). There are two cases where iso_chan_add() does not create an association: it returns success when the socket is already attached to the same iso_conn, and it returns -EBUSY when another socket is attached. The hold returned for the current call is unused in both cases. This occurs when deferred setup calls iso_connect_cis() again for its existing socket, or when another socket attempts to reuse the CIS. Detect the idempotent case while the connection is locked and release the unused hold after iso_chan_add(). Also release it on -EBUSY. Do not drop it for other errors: a newly allocated iso_conn releases the transferred hold when its last temporary reference is put.",
    "evidence": "osv:CVE-2026-98458",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.113",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98458",
      "aliases": [
        "CVE-2026-98458"
      ],
      "affected": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
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                  "fixed": "0fcd4dad555c96e0bd3a1b8c569f989be85c7341"
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          "database_specific": {
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        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.6.0"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.55"
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            {
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              "events": [
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                  "introduced": "6.19.0"
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                {
                  "fixed": "7.2.9"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
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          }
        }
      ],
      "modified": "2026-10-28T02:30:52.254472974Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0fcd4dad555c96e0bd3a1b8c569f989be85c7341",
        "https://git.kernel.org/stable/c/e0e8b70207eaf27aee0a05ec5bf2d1b6bcb004d1",
        "https://git.kernel.org/stable/c/e5fcca51177f224604e3a8c926ffd5edbeb58b09",
        "https://git.kernel.org/stable/c/ed4c026cc4094dfb7a329b9d8df0ddd0be1b2458",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98458.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98458",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98458.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98458",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521005,
  "published_at": "2026-10-18T15:15:07.572+00:00"
}