CVE-2026-80764None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix LE list UAF on reset hci_cc_reset() clears the LE accept and resolving lists without taking hdev->lock. Other command-complete handlers seria…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_event: fix LE list UAF on reset
hci_cc_reset() clears the LE accept and resolving lists without taking hdev->lock. Other command-complete handlers serialize updates to these lists with that lock, and the debugfs readers hold it while walking them.
This permits the reset completion and a debugfs read to interleave as follows:
hci_rx_work debugfs reader
lock hdev->lock
fetch current entry
list_del(entry) kfree(entry) read entry fields
The reader then dereferences a freed list entry and may follow its stale next pointer.
KASAN reported:
BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180 Read of size 1 at addr ffff8881015dab16 by task poc/95
Call Trace: white_list_show+0x15f/0x180 seq_read_iter+0x3ff/0x1190 seq_read+0x267/0x3d0 vfs_read+0x177/0xa20 ksys_read+0xf7/0x1c0
Allocated by task 91: hci_bdaddr_list_add+0x1a6/0x3a0 hci_cc_le_add_to_accept_list+0xab/0x140 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730
Freed by task 90: kfree+0x131/0x3c0 hci_bdaddr_list_clear+0xd8/0x160 hci_cc_reset+0x28a/0x370 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730
Take hdev->lock around both list clears. This matches the existing mutation and traversal locking convention.
Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 8e68c380290b1dd64a0a512ce66d0264130c46edLinux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 0628cc9b2fa29985a7b8c774741f8a736b0f5e7cLinux >= a4d5504d5c39cc84f1f828e19967595597a8136e < d57702d4c55633c243da5a2fec37ae2ad4adb621Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 39a3afb91be3cb465f46ce7a8e5696d9e33edf93Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < b55e83a4ba31d40deae22d4e4dc8c84083e953c6Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 25b05e3ce31d954540e99954bcc66cbceb27ab35Linux >= a4d5504d5c39cc84f1f828e19967595597a8136e < 33af47e847fe4a28b109673affb5874015d54f5aLinux 0de8cd646b0152c9ddd10257d8284938d0df0181Linux >= 3.18.3 < 3.19Linux 3.19Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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