CVE-2025-68305

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Bluetooth: hci_sock: Prevent race in socket write iter and sock bind<br /> <br /> There is a potential race condition between sock bind and socket write<br /> iter. bind may free the same cmd via mgmt_pending before write iter sends<br /> the cmd, just as syzbot reported in UAF[1].<br /> <br /> Here we use hci_dev_lock to synchronize the two, thereby avoiding the<br /> UAF mentioned in [1].<br /> <br /> [1]<br /> syzbot reported:<br /> BUG: KASAN: slab-use-after-free in mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316<br /> Read of size 8 at addr ffff888077164818 by task syz.0.17/5989<br /> Call Trace:<br /> mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316<br /> set_link_security+0x5c2/0x710 net/bluetooth/mgmt.c:1918<br /> hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719<br /> hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839<br /> sock_sendmsg_nosec net/socket.c:727 [inline]<br /> __sock_sendmsg+0x21c/0x270 net/socket.c:742<br /> sock_write_iter+0x279/0x360 net/socket.c:1195<br /> <br /> Allocated by task 5989:<br /> mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296<br /> set_link_security+0x557/0x710 net/bluetooth/mgmt.c:1910<br /> hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719<br /> hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839<br /> sock_sendmsg_nosec net/socket.c:727 [inline]<br /> __sock_sendmsg+0x21c/0x270 net/socket.c:742<br /> sock_write_iter+0x279/0x360 net/socket.c:1195<br /> <br /> Freed by task 5991:<br /> mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline]<br /> mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257<br /> mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9477<br /> hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1314