{"id":"CVE-2026-80764","title":"Bluetooth: hci_event: fix LE list UAF on reset","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix LE list UAF on reset\n\nhci_cc_reset() clears the LE accept and resolving lists without taking\nhdev->lock. Other command-complete handlers seria…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 8e68c380290b1dd64a0a512ce66d0264130c46ed","Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 0628cc9b2fa29985a7b8c774741f8a736b0f5e7c","Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < d57702d4c55633c243da5a2fec37ae2ad4adb621","Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 39a3afb91be3cb465f46ce7a8e5696d9e33edf93","Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < b55e83a4ba31d40deae22d4e4dc8c84083e953c6","Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 25b05e3ce31d954540e99954bcc66cbceb27ab35","Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 33af47e847fe4a28b109673affb5874015d54f5a","Linux 0de8cd646b0152c9ddd10257d8284938d0df0181","Linux >= 3.18.3 < 3.19","Linux 3.19"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:43:20.790Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80764","references":[{"url":"https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed"},{"url":"https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c"},{"url":"https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621"},{"url":"https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93"},{"url":"https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6"},{"url":"https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35"},{"url":"https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a"}],"tags":["cve.org"],"epss":0.00173,"epssPercentile":0.06219,"ingestedAt":"2026-10-19T10:20:54.952Z","slug":"CVE-2026-80764","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix LE list UAF on reset\n\nhci_cc_reset() clears the LE accept and resolving lists without taking\nhdev->lock. Other command-complete handlers serialize updates to these\nlists with that lock, and the debugfs readers hold it while walking them.\n\nThis permits the reset completion and a debugfs read to interleave as\nfollows:\n\n  hci_rx_work                 debugfs reader\n  -----------                 --------------\n                              lock hdev->lock\n                              fetch current entry\n  list_del(entry)\n  kfree(entry)\n                              read entry fields\n\nThe reader then dereferences a freed list entry and may follow its stale\nnext pointer.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180\n  Read of size 1 at addr ffff8881015dab16 by task poc/95\n\n  Call Trace:\n   white_list_show+0x15f/0x180\n   seq_read_iter+0x3ff/0x1190\n   seq_read+0x267/0x3d0\n   vfs_read+0x177/0xa20\n   ksys_read+0xf7/0x1c0\n\n  Allocated by task 91:\n   hci_bdaddr_list_add+0x1a6/0x3a0\n   hci_cc_le_add_to_accept_list+0xab/0x140\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\n  Freed by task 90:\n   kfree+0x131/0x3c0\n   hci_bdaddr_list_clear+0xd8/0x160\n   hci_cc_reset+0x28a/0x370\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\nTake hdev->lock around both list clears. This matches the existing\nmutation and traversal locking convention.\n\n## Affected\n\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 8e68c380290b1dd64a0a512ce66d0264130c46ed`\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 0628cc9b2fa29985a7b8c774741f8a736b0f5e7c`\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < d57702d4c55633c243da5a2fec37ae2ad4adb621`\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 39a3afb91be3cb465f46ce7a8e5696d9e33edf93`\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < b55e83a4ba31d40deae22d4e4dc8c84083e953c6`\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 25b05e3ce31d954540e99954bcc66cbceb27ab35`\n- `Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 33af47e847fe4a28b109673affb5874015d54f5a`\n- `Linux 0de8cd646b0152c9ddd10257d8284938d0df0181`\n- `Linux >= 3.18.3 < 3.19`\n- `Linux 3.19`\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":[]}