CVE-2026-80764
Full vulnerability record from the local CVENow database.
Description
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.
View original CVE JSON
{
"id": "CVE-2026-80764",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-04T16:18:01.617",
"lastModified": "2026-10-19T09:17:10.270",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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 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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"net/bluetooth/hci_event.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "8e68c380290b1dd64a0a512ce66d0264130c46ed",
"versionType": "git",
"status": "affected"
},
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "0628cc9b2fa29985a7b8c774741f8a736b0f5e7c",
"versionType": "git",
"status": "affected"
},
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "d57702d4c55633c243da5a2fec37ae2ad4adb621",
"versionType": "git",
"status": "affected"
},
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "39a3afb91be3cb465f46ce7a8e5696d9e33edf93",
"versionType": "git",
"status": "affected"
},
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "b55e83a4ba31d40deae22d4e4dc8c84083e953c6",
"versionType": "git",
"status": "affected"
},
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "25b05e3ce31d954540e99954bcc66cbceb27ab35",
"versionType": "git",
"status": "affected"
},
{
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "33af47e847fe4a28b109673affb5874015d54f5a",
"versionType": "git",
"status": "affected"
},
{
"version": "0de8cd646b0152c9ddd10257d8284938d0df0181",
"versionType": "git",
"status": "affected"
},
{
"version": "3.18.3",
"lessThan": "3.19",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"net/bluetooth/hci_event.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "3.19",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.19",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.185",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.154",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.106",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.47",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1.11",
"lessThanOrEqual": "7.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.1",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}