FKIE_CVE-2025-40318
Vulnerability from fkie_nvd - Published: 2025-12-08 01:16 - Updated: 2026-10-15 22:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once
hci_cmd_sync_dequeue_once() does lookup and then cancel
the entry under two separate lock sections. Meanwhile,
hci_cmd_sync_work() can also delete the same entry,
leading to double list_del() and "UAF".
Fix this by holding cmd_sync_work_lock across both
lookup and cancel, so that the entry cannot be removed
concurrently.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0a94f7e017438935c09ef833a1aa908ad9875213",
"status": "affected",
"version": "f00f36db76eb8fd10d13e80e2590f23b5beaa54d",
"versionType": "git"
},
{
"lessThan": "932c0a4f77ac13e526fdd5b42914d29c9821d389",
"status": "affected",
"version": "1499f79995c7ee58e3bfeeff75f6d1b37dcda881",
"versionType": "git"
},
{
"lessThan": "ae76cf6c2c842944c6514c57df54d728f1916553",
"status": "affected",
"version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
"versionType": "git"
},
{
"lessThan": "9cd536970192b72257afcdfba0bfc09993e6f19c",
"status": "affected",
"version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
"versionType": "git"
},
{
"lessThan": "09b0cd1297b4dbfe736aeaa0ceeab2265f47f772",
"status": "affected",
"version": "505ea2b295929e7be2b4e1bc86ee31cb7862fb01",
"versionType": "git"
},
{
"status": "affected",
"version": "357603f4d396d85fbf0045512efaf1d7f7394ed7",
"versionType": "git"
},
{
"lessThan": "6.1.159",
"status": "affected",
"version": "6.1.120",
"versionType": "semver"
},
{
"lessThan": "6.6.117",
"status": "affected",
"version": "6.6.51",
"versionType": "semver"
},
{
"lessThan": "6.9",
"status": "affected",
"version": "6.8.9",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"lessThan": "6.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.117",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.58",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once\n\nhci_cmd_sync_dequeue_once() does lookup and then cancel\nthe entry under two separate lock sections. Meanwhile,\nhci_cmd_sync_work() can also delete the same entry,\nleading to double list_del() and \"UAF\".\n\nFix this by holding cmd_sync_work_lock across both\nlookup and cancel, so that the entry cannot be removed\nconcurrently."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nBluetooth: hci_sync: correcci\u00f3n de condici\u00f3n de carrera en hci_cmd_sync_dequeue_once\n\nhci_cmd_sync_dequeue_once() realiza una b\u00fasqueda y luego cancela la entrada bajo dos secciones de bloqueo separadas. Mientras tanto, hci_cmd_sync_work() tambi\u00e9n puede eliminar la misma entrada, lo que lleva a un doble list_del() y \u0027UAF\u0027.\n\nEsto se soluciona manteniendo cmd_sync_work_lock durante la b\u00fasqueda y la cancelaci\u00f3n, para que la entrada no pueda ser eliminada concurrentemente."
}
],
"id": "CVE-2025-40318",
"lastModified": "2026-10-15T22:19:07.860",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-40318",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-15T21:59:09.036526Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-12-08T01:16:04.413",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/09b0cd1297b4dbfe736aeaa0ceeab2265f47f772"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0a94f7e017438935c09ef833a1aa908ad9875213"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/932c0a4f77ac13e526fdd5b42914d29c9821d389"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9cd536970192b72257afcdfba0bfc09993e6f19c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ae76cf6c2c842944c6514c57df54d728f1916553"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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