CVE-2026-80764Bluetooth: hci_event: fix LE list UAF on reset
Updated under an hour ago ()
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a4d5504d5c39cc84f1f828e19967595597a8136e before 8e68c380290b1dd64a0a512ce66d0264130c46ed; from a4d5504d5c39cc84f1f828e19967595597a8136e before 0628cc9b2fa29985a7b8c774741f8a736b0f5e7c; from a4d5504d5c39cc84f1f828e19967595597a8136e before d57702d4c55633c243da5a2fec37ae2ad4adb621; from a4d5504d5c39cc84f1f828e19967595597a8136e before 39a3afb91be3cb465f46ce7a8e5696d9e33edf93; from a4d5504d5c39cc84f1f828e19967595597a8136e before b55e83a4ba31d40deae22d4e4dc8c84083e953c6; from a4d5504d5c39cc84f1f828e19967595597a8136e before 25b05e3ce31d954540e99954bcc66cbceb27ab35; from a4d5504d5c39cc84f1f828e19967595597a8136e before 33af47e847fe4a28b109673affb5874015d54f5a; 0de8cd646b0152c9ddd10257d8284938d0df0181; and 1 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed
- https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c
- https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621
- https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93
- https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6
- https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35
- https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.