High · published September 16, 2025
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
conn->chan_lock isn't acquired before l2cap_get_chan_by_scid,
if l2cap_get_chan_by_scid returns NULL, then 'bad unlock balance'
is triggered.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | < 4.14.316 | 4.14.316 |
| linux/linux_kernel | ≥ 4.15, < 4.19.284 | 4.19.284 |
| linux/linux_kernel | ≥ 4.20, < 5.4.244 | 5.4.244 |
| linux/linux_kernel | ≥ 5.5, < 5.10.181 | 5.10.181 |
| linux/linux_kernel | ≥ 5.11, < 5.15.113 | 5.15.113 |
| linux/linux_kernel | ≥ 5.16, < 6.1.30 | 6.1.30 |
| linux/linux_kernel | ≥ 6.2, < 6.3.4 | 6.3.4 |