CVE-2026-98458 (GCVE-0-2026-98458)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:15 – Updated: 2026-10-19 09:19
VLAI
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6846 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd , < e0e8b70207eaf27aee0a05ec5bf2d1b6bcb004d1 (git)
Affected: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd , < ed4c026cc4094dfb7a329b9d8df0ddd0be1b2458 (git)
Affected: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd , < e5fcca51177f224604e3a8c926ffd5edbeb58b09 (git)
Affected: 69997d50ec574be816b4ee8f9cee52ebbd53f8bd , < 0fcd4dad555c96e0bd3a1b8c569f989be85c7341 (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "net/bluetooth/iso.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: release unused CIS holds after channel attach\n\nhci_bind_cis() and hci_connect_cis() return one hci_conn hold for the\nISO layer.  A new channel association consumes that hold, which is\neventually released by iso_conn_free().\n\nThere are two cases where iso_chan_add() does not create an association:\nit returns success when the socket is already attached to the same\niso_conn, and it returns -EBUSY when another socket is attached.  The\nhold returned for the current call is unused in both cases.  This occurs\nwhen deferred setup calls iso_connect_cis() again for its existing\nsocket, or when another socket attempts to reuse the CIS.\n\nDetect the idempotent case while the connection is locked and release\nthe unused hold after iso_chan_add().  Also release it on -EBUSY.  Do not\ndrop it for other errors: a newly allocated iso_conn releases the\ntransferred hold when its last temporary reference is put."
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "Bluetooth: ISO: release unused CIS holds after channel attach",
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    "datePublished": "2026-10-18T15:15:07.572Z",
    "dateReserved": "2026-09-25T10:25:14.350Z",
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    "state": "PUBLISHED"
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      "date": "2026-11-03",
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          }
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        "lastModified": "2026-10-19T10:18:55.257",
        "metrics": {},
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}



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