Live › vulnerability › CVE-2026-98458
Go to dashboardThe Linux kernel's Bluetooth ISO layer keeps an extra connection reference when a socket re-requests a CIS it already holds, or when another socket tries to reuse one, so the reference is never released. The sources describe a resource leak and do not state an attacker-controlled impact.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Systems running a Linux kernel with Bluetooth LE Isochronous channel (CIS) support in the affected range; the sources do not list affected kernel versions. Systems without Bluetooth ISO use, or with Bluetooth disabled, are unlikely to be exposed.
No product ranges from the sources yet.
Unknown from the sources.
Unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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