Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_changerfcomm_sk_state_change attempts to use sock_lock so it must never becalled with it locked but rfcomm_sock_ioctl always attempt to lock itcausing the following trace:======================================================WARNING: possible circular locking dependency detected6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted------------------------------------------------------syz-executor386/5093 is trying to acquire lock:ffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline]ffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x5b/0x310 net/bluetooth/rfcomm/sock.c:73but task is already holding lock:ffff88807badfd28 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x226/0x6a0 net/bluetooth/rfcomm/core.c:491
No PoCs from references.
- https://github.com/w4zu/Debian_security