296,213
Total vulnerabilities in the database
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix possible deadlock in rfcomm_sk_state_change
syzbot reports a possible deadlock in rfcomm_sk_state_change [1]. While rfcomm_sock_connect acquires the sk lock and waits for the rfcomm lock, rfcomm_sock_release could have the rfcomm lock and hit a deadlock for acquiring the sk lock. Here's a simplified flow:
rfcomm_sock_connect: lock_sock(sk) rfcomm_dlc_open: rfcomm_lock()
rfcomm_sock_release: rfcomm_sock_shutdown: rfcomm_lock() __rfcomm_dlc_close: rfcomm_k_state_change: lock_sock(sk)
This patch drops the sk lock before calling rfcomm_dlc_open to avoid the possible deadlock and holds sk's reference count to prevent use-after-free after rfcomm_dlc_open completes.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 6.2-rc1 | 6.2-rc1.x |
| linux / linux_kernel | 6.2-rc2 | 6.2-rc2.x |
| linux / linux_kernel | 6.2-rc3 | 6.2-rc3.x |
| linux / linux_kernel | 6.2-rc4 | 6.2-rc4.x |
| linux / linux_kernel | 5.16 | 6.1.9 |
| linux / linux_kernel | 5.15 | 5.15.91 |