{"id":"CVE-2025-68305","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sock: Prevent race in socket write iter and sock bind\n\nThere is a potential race condition between sock bind and socket write\niter","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sock: Prevent race in socket write iter and sock bind\n\nThere is a potential race condition between sock bind and socket write\niter. bind may free the sam…","severity":"none","published":"2025-12-16","updated":"2026-08-23","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68305","references":[{"url":"https://git.kernel.org/stable/c/69fcb0344bc0dd5b13d7e4e98f8b6bf25a6d4ff7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7344feaed3c8aa46d397984ae855e6026d3c3e95","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/89bb613511cc21ed5ba6bddc1c9b9ae9c0dad392","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e90c05fc5bbea956450a05cc3b36b8fa29cf195e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fe68510fc99bb4b88c9c611f83699749002d515a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00187,"epssPercentile":0.0736,"ingestedAt":"2026-08-23T13:48:04.941Z","slug":"CVE-2025-68305","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sock: Prevent race in socket write iter and sock bind\n\nThere is a potential race condition between sock bind and socket write\niter. bind may free the same cmd via mgmt_pending before write iter sends\nthe cmd, just as syzbot reported in UAF[1].\n\nHere we use hci_dev_lock to synchronize the two, thereby avoiding the\nUAF mentioned in [1].\n\n[1]\nsyzbot reported:\nBUG: KASAN: slab-use-after-free in mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316\nRead of size 8 at addr ffff888077164818 by task syz.0.17/5989\nCall Trace:\n mgmt_pending_remove+0x3b/0x210 net/bluetooth/mgmt_util.c:316\n set_link_security+0x5c2/0x710 net/bluetooth/mgmt.c:1918\n hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719\n hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg+0x21c/0x270 net/socket.c:742\n sock_write_iter+0x279/0x360 net/socket.c:1195\n\nAllocated by task 5989:\n mgmt_pending_add+0x35/0x140 net/bluetooth/mgmt_util.c:296\n set_link_security+0x557/0x710 net/bluetooth/mgmt.c:1910\n hci_mgmt_cmd+0x9c9/0xef0 net/bluetooth/hci_sock.c:1719\n hci_sock_sendmsg+0x6ca/0xef0 net/bluetooth/hci_sock.c:1839\n sock_sendmsg_nosec net/socket.c:727 [inline]\n __sock_sendmsg+0x21c/0x270 net/socket.c:742\n sock_write_iter+0x279/0x360 net/socket.c:1195\n\nFreed by task 5991:\n mgmt_pending_free net/bluetooth/mgmt_util.c:311 [inline]\n mgmt_pending_foreach+0x30d/0x380 net/bluetooth/mgmt_util.c:257\n mgmt_index_removed+0x112/0x2f0 net/bluetooth/mgmt.c:9477\n hci_sock_bind+0xbe9/0x1000 net/bluetooth/hci_sock.c:1314\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}