CVE-2026-98459
N/AIn 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().
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 6th percentile
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-98459/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-98459/poc.json
References
Technical & other
- https://git.kernel.org/stable/c/ff28e6c67143c76ef50c3eac01f2fad411705f71
- https://git.kernel.org/stable/c/03a91cdf6862fb351a74f035ad21e70112438552
- https://git.kernel.org/stable/c/4e49206d9574a4c109480198e73aea34ad0ed7f6
- https://git.kernel.org/stable/c/bbcd723ee7a84bc868142fd57717af88e54e555a
- https://git.kernel.org/stable/c/4c94557dd02569efa6c1072a0439addaef9a5224