CVE-2026-98459
Received
Received - Intake
Bluetooth Use-After-Free in Linux Kernel
Vulnerability report for CVE-2026-98459, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-18
Last updated on: 2026-10-18
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: balance the parent hold in hci_bind_bis()
hci_conn_link() takes a lifetime reference to its parent with
hci_conn_get(), but only takes an operational hold on the child.
hci_conn_unlink() later balances both a hold and a reference on the
parent.
The SCO and CIS paths pass a parent acquired from a connect helper, so
it already has a hold. For an additional BIS, hci_bind_bis() obtains the
parent from hci_conn_hash_lookup_big(), which returns a bare pointer.
Unlinking the child then drops the parent's existing hold and can
schedule it for disconnection while its socket is still using it.
Take a hold on the parent before linking it and drop that hold if linking
fails. A successful link transfers the hold to hci_conn_unlink().
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9 |
| Linux | Linux | fa224d0c094a458e9ebf5ea9b1c696136b7af427 |
| Linux | Linux | fa224d0c094a458e9ebf5ea9b1c696136b7af427 |
| Linux | Linux | fa224d0c094a458e9ebf5ea9b1c696136b7af427 |
| Linux | Linux | fa224d0c094a458e9ebf5ea9b1c696136b7af427 |
| Linux | Linux | 6.6.67 |
| Linux | Linux | 6.8 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
