{"id":41209,"date":"2026-10-19T00:32:37","date_gmt":"2026-10-18T16:32:37","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98737"},"modified":"2026-10-19T00:32:37","modified_gmt":"2026-10-18T16:32:37","slug":"cve-2026-98737","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98737","title":{"rendered":"CVE-2026-98737 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync:"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: hci_sync: Fix inquiry cache use-after-free<\/p>\n<p>The sync command worker holds hdev-&gt;req_lock, but inquiry-cache updates<br \/>\nand flushes use hdev-&gt;lock. Both hci_acl_create_conn_sync() and<br \/>\nhci_stop_discovery_sync() look up entries and read their fields without<br \/>\ntaking hdev-&gt;lock.<\/p>\n<p>After either lookup returns, a concurrent HCIINQUIRY ioctl can acquire<br \/>\nhdev-&gt;lock and flush the cache, freeing the entry. The worker then reads<br \/>\nthe freed entry while preparing a create-connection or remote-name-cancel<br \/>\ncommand. The list traversal also races with cache updates and removal.<\/p>\n<p>KASAN reported these accesses:<\/p>\n<p>  BUG: KASAN: slab-use-after-free in hci_acl_create_conn_sync+0x5f1\/0x650<br \/>\n  Workqueue: hci0 hci_cmd_sync_work<br \/>\n  Call Trace:<br \/>\n   hci_acl_create_conn_sync+0x5f1\/0x650<br \/>\n   hci_cmd_sync_work+0x13c\/0x290<\/p>\n<p>  Allocated by task 90:<br \/>\n   hci_inquiry_cache_update+0x3e6\/0x7d0<br \/>\n   hci_inquiry_result_evt+0x3cb\/0x560<\/p>\n<p>  Freed by task 93:<br \/>\n   hci_inquiry_cache_flush+0x111\/0x2b0<br \/>\n   hci_inquiry+0x2f2\/0x780<br \/>\n   hci_sock_ioctl+0x269\/0x5f0<\/p>\n<p>  BUG: KASAN: slab-use-after-free in hci_stop_discovery_sync+0x3b1\/0x3c0<br \/>\n  Workqueue: hci0 hci_cmd_sync_work<br \/>\n  Call Trace:<br \/>\n   hci_stop_discovery_sync+0x3b1\/0x3c0<br \/>\n   hci_cmd_sync_work+0x173\/0x300<\/p>\n<p>  Allocated by task 86:<br \/>\n   hci_inquiry_cache_update+0x483\/0x940<br \/>\n   hci_inquiry_result_evt+0x3cb\/0x560<\/p>\n<p>  Freed by task 91:<br \/>\n   hci_inquiry_cache_flush+0x13e\/0x2f0<br \/>\n   hci_inquiry+0x2f2\/0x780<br \/>\n   hci_sock_ioctl+0x269\/0x5f0<\/p>\n<p>Hold hdev-&gt;lock across each lookup and all reads from its result. Copy the<br \/>\nremote address before unlocking so discovery cancellation does not retain<br \/>\na cache entry pointer. Release the lock before sending synchronous HCI<br \/>\ncommands, since their completion handlers may need the same lock.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: hci_sync: Fix inquiry cache use-after-free<\/p>\n<p>The sync command worker holds hdev-&gt;req_lock, but inquiry-cache updates<br \/>\nand <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41209","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}