{"id":17268,"date":"2026-09-05T02:30:56","date_gmt":"2026-09-04T18:30:56","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80764"},"modified":"2026-09-05T02:30:56","modified_gmt":"2026-09-04T18:30:56","slug":"cve-2026-80764","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80764","title":{"rendered":"CVE-2026-80764 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event:"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: hci_event: fix LE list UAF on reset<\/p>\n<p>hci_cc_reset() clears the LE accept and resolving lists without taking<br \/>\nhdev-&gt;lock. Other command-complete handlers serialize updates to these<br \/>\nlists with that lock, and the debugfs readers hold it while walking them.<\/p>\n<p>This permits the reset completion and a debugfs read to interleave as<br \/>\nfollows:<\/p>\n<p>  hci_rx_work                 debugfs reader<br \/>\n  &#8212;&#8212;&#8212;&#8211;                 &#8212;&#8212;&#8212;&#8212;&#8211;<br \/>\n                              lock hdev-&gt;lock<br \/>\n                              fetch current entry<br \/>\n  list_del(entry)<br \/>\n  kfree(entry)<br \/>\n                              read entry fields<\/p>\n<p>The reader then dereferences a freed list entry and may follow its stale<br \/>\nnext pointer.<\/p>\n<p>KASAN reported:<\/p>\n<p>  BUG: KASAN: slab-use-after-free in white_list_show+0x15f\/0x180<br \/>\n  Read of size 1 at addr ffff8881015dab16 by task poc\/95<\/p>\n<p>  Call Trace:<br \/>\n   white_list_show+0x15f\/0x180<br \/>\n   seq_read_iter+0x3ff\/0x1190<br \/>\n   seq_read+0x267\/0x3d0<br \/>\n   vfs_read+0x177\/0xa20<br \/>\n   ksys_read+0xf7\/0x1c0<\/p>\n<p>  Allocated by task 91:<br \/>\n   hci_bdaddr_list_add+0x1a6\/0x3a0<br \/>\n   hci_cc_le_add_to_accept_list+0xab\/0x140<br \/>\n   hci_cmd_complete_evt+0x26c\/0x9a0<br \/>\n   hci_event_packet+0x454\/0xb20<br \/>\n   hci_rx_work+0x293\/0x730<\/p>\n<p>  Freed by task 90:<br \/>\n   kfree+0x131\/0x3c0<br \/>\n   hci_bdaddr_list_clear+0xd8\/0x160<br \/>\n   hci_cc_reset+0x28a\/0x370<br \/>\n   hci_cmd_complete_evt+0x26c\/0x9a0<br \/>\n   hci_event_packet+0x454\/0xb20<br \/>\n   hci_rx_work+0x293\/0x730<\/p>\n<p>Take hdev-&gt;lock around both list clears. This matches the existing<br \/>\nmutation and traversal locking convention.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: hci_event: fix LE list UAF on reset<\/p>\n<p>hci_cc_reset() clears the LE accept and resolving lists without taking<br \/>\nhdev-&gt;lock. <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17268","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17268","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=17268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}