Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: fix refcounting of iso_conn
iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn:
[Task hdev->workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn->sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) <---------´ if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */
The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk.
Fix by having iso_pi(sk)->conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= a58d0f5dac322e16cc75334d000666512341bde5, < 42c8bd6ac81e21200bb90f1eaf43d19352eec6d7; >= dc26097bdb864a0d5955b9a25e43376ffc1af99b, < 3b921533e8aa95b77aadcf31737595578e735f3c; >= dc26097bdb864a0d5955b9a25e43376ffc1af99b, < 8208b4939afb0a1977fffe902c3ca42fe0f3baaa; >= dc26097bdb864a0d5955b9a25e43376ffc1af99b, < fdfde532ab1caa165fcd8985001157ac8b4db365; f53e7489273dc2bb307bf50f319b3762d45534f0; >= 6.12.2, < 6.12.113; >= 6.11.11, < 6.12 |
| Linux | Linux | 6.13 |
References
Timeline
- Published
- Aug 15, 2026
- Last modified
- Oct 23, 2026
- NVD status
- Received