CVE-2026-80762
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_sync: Fix accept list UAF during suspend
hci_update_event_filter_sync() walks hdev->accept_list while sending a synchronous HCI command for each remote-wakeup device. The suspend path holds hdev->req_lock, but accept-list updates are serialized by hdev->lock. Consequently, remove_device() can free the current list entry during the controller wait.
The following interleaving causes the use-after-free:
Snapshot the remote-wakeup addresses under hdev->lock. Release the lock before sending HCI commands.
Leer descripción completaMostrar menos
Clear the controller event filter before building the snapshot, and skip allocation and the second list traversal when there are no matching entries. This preserves the original filter and scan-state updates without retaining an accept-list node across a controller wait.
Detalles técnicos trazas, registros y código del informe original
hci_update_event_filter_sync() remove_device()
fetch accept-list entry
hci_set_event_filter_sync()
wait for controller response hci_dev_lock()
list_del()
kfree()
hci_dev_unlock()
read the freed list.next
KASAN reported:
BUG: KASAN: slab-use-after-free in hci_suspend_sync+0x835/0x910
Read of size 8 at addr ffff88810bec8440 by task kworker/0:1/10
Workqueue: events vhci_suspend_work
Call Trace:
hci_suspend_sync+0x835/0x910
hci_suspend_dev+0x182/0x450
process_one_work+0x661/0x1090
worker_thread+0x45b/0xd10
Allocated by task 86:
hci_bdaddr_list_add_with_flags+0x1a8/0x400
add_device+0x381/0x820
hci_sock_sendmsg+0x1033/0x1ea0
Freed by task 91:
kfree+0x131/0x3c0
remove_device+0x429/0xb70
hci_sock_sendmsg+0x1033/0x1ea0CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 6
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/29c59212a507804d7616b8abf491d30b4ab8e75f
- https://git.kernel.org/stable/c/87ad116ac3abc6f2ce2b5b6c488f633003581eee
- https://git.kernel.org/stable/c/95bb57bc11a91caf042ad00fca85e480d3fda37f
- https://git.kernel.org/stable/c/b5181516a9f5c2fdb3271cdad72a5b16c6963a44
- https://git.kernel.org/stable/c/bb5f5414d1a6272a16f68684e998f4063dd19f57
- https://git.kernel.org/stable/c/f57b399c4fa1501b2d5451f52d861ece86bcf3db
- https://git.kernel.org/stable/c/fe93a697a7a92fa9adf78c9ff67a10db3193290c
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-80762",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
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"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
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],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.187",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-04T16:18:01.313",
"references": [
{
"url": "https://git.kernel.org/stable/c/29c59212a507804d7616b8abf491d30b4ab8e75f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/87ad116ac3abc6f2ce2b5b6c488f633003581eee",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/fe93a697a7a92fa9adf78c9ff67a10db3193290c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix accept list UAF during suspend\n\nhci_update_event_filter_sync() walks hdev->accept_list while sending a\nsynchronous HCI command for each remote-wakeup device. The suspend path\nholds hdev->req_lock, but accept-list updates are serialized by hdev->lock.\nConsequently, remove_device() can free the current list entry during the\ncontroller wait.\n\nThe following interleaving causes the use-after-free:\n\n hci_update_event_filter_sync() remove_device()\n fetch accept-list entry\n hci_set_event_filter_sync()\n wait for controller response hci_dev_lock()\n list_del()\n kfree()\n hci_dev_unlock()\n read the freed list.next\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in hci_suspend_sync+0x835/0x910\n Read of size 8 at addr ffff88810bec8440 by task kworker/0:1/10\n Workqueue: events vhci_suspend_work\n Call Trace:\n hci_suspend_sync+0x835/0x910\n hci_suspend_dev+0x182/0x450\n process_one_work+0x661/0x1090\n worker_thread+0x45b/0xd10\n\n Allocated by task 86:\n hci_bdaddr_list_add_with_flags+0x1a8/0x400\n add_device+0x381/0x820\n hci_sock_sendmsg+0x1033/0x1ea0\n\n Freed by task 91:\n kfree+0x131/0x3c0\n remove_device+0x429/0xb70\n hci_sock_sendmsg+0x1033/0x1ea0\n\nSnapshot the remote-wakeup addresses under hdev->lock. Release the lock\nbefore sending HCI commands. Clear the controller event filter before\nbuilding the snapshot, and skip allocation and the second list traversal\nwhen there are no matching entries. This preserves the original filter\nand scan-state updates without retaining an accept-list node across a\ncontroller wait."
}
],
"lastModified": "2026-09-04T16:18:01.313",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}