CVE-2026-97908
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btqcomsmd: destroy RPMsg endpoints before freeing hci_dev
The command and ACL RPMsg endpoints store struct btqcomsmd as their callback private data. The receive callbacks dereference btq->hdev without taking an hci_dev reference.
The current teardown order frees the hci_dev before destroying the RPMsg endpoints in both the hci_register_dev() error path and the driver remove path. If WCNSS delivers data in that window, the endpoint callback can run with an already freed hci_dev and pass it to the Bluetooth core.
For qcom_smd endpoints, rpmsg_destroy_ept() closes the channel and clears the callback under the channel recv_lock.
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The receive path holds the same lock while invoking the callback, so destroying the endpoints first both prevents new callbacks and serializes with any callback already running.
Destroy the command and ACL endpoints before hci_free_dev(). Keep hci_unregister_dev() first during remove so the HCI core stops issuing operations before the transport endpoints are shut down. In the full registration-error cleanup path, return directly after freeing the hci_dev to avoid falling through to the partial-construction labels and destroying the endpoints twice.
CVSS
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: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- 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
JSON original (NVD)
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{
"id": "CVE-2026-97908",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"programFiles": [
"drivers/bluetooth/btqcomsmd.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
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{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
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{
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"version": "7.3-rc3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
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],
"published": "2026-09-25T11:17:17.730",
"references": [
{
"url": "https://git.kernel.org/stable/c/2d016208a011558f211ec9687889df8318654730",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/2dcc2240b4e5f6e5dce1736f82666aba40eb3b13",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/f5a427b16e45210dee656b0860728f3d496dee85",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btqcomsmd: destroy RPMsg endpoints before freeing hci_dev\n\nThe command and ACL RPMsg endpoints store struct btqcomsmd as their\ncallback private data. The receive callbacks dereference btq->hdev\nwithout taking an hci_dev reference.\n\nThe current teardown order frees the hci_dev before destroying the RPMsg\nendpoints in both the hci_register_dev() error path and the driver remove\npath. If WCNSS delivers data in that window, the endpoint callback can\nrun with an already freed hci_dev and pass it to the Bluetooth core.\n\nFor qcom_smd endpoints, rpmsg_destroy_ept() closes the channel and clears\nthe callback under the channel recv_lock. The receive path holds the same\nlock while invoking the callback, so destroying the endpoints first both\nprevents new callbacks and serializes with any callback already running.\n\nDestroy the command and ACL endpoints before hci_free_dev(). Keep\nhci_unregister_dev() first during remove so the HCI core stops issuing\noperations before the transport endpoints are shut down. In the full\nregistration-error cleanup path, return directly after freeing the hci_dev\nto avoid falling through to the partial-construction labels and destroying\nthe endpoints twice."
}
],
"lastModified": "2026-09-25T11:17:17.730",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}