Description (CNA)
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().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9 before ff28e6c67143c76ef50c3eac01f2fad411705f71; affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 before 03a91cdf6862fb351a74f035ad21e70112438552; affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 before 4e49206d9574a4c109480198e73aea34ad0ed7f6; affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 before bbcd723ee7a84bc868142fd57717af88e54e555a; affected fa224d0c094a458e9ebf5ea9b1c696136b7af427 before 4c94557dd02569efa6c1072a0439addaef9a5224; affected 6.6.67 before 6.6.158 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- 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