CVE-2025-39861 (GCVE-0-2025-39861)
Vulnerability from cvelistv5
Published
2025-09-19 15:26
Modified
2025-09-19 15:26
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: vhci: Prevent use-after-free by removing debugfs files early
Move the creation of debugfs files into a dedicated function, and ensure
they are explicitly removed during vhci_release(), before associated
data structures are freed.
Previously, debugfs files such as "force_suspend", "force_wakeup", and
others were created under hdev->debugfs but not removed in
vhci_release(). Since vhci_release() frees the backing vhci_data
structure, any access to these files after release would result in
use-after-free errors.
Although hdev->debugfs is later freed in hci_release_dev(), user can
access files after vhci_data is freed but before hdev->debugfs is
released.
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/bluetooth/hci_vhci.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bd75eba88e88d7b896b0c737b02a74a12afc235f",
"status": "affected",
"version": "ab4e4380d4e158486e595013a2635190e07e28ce",
"versionType": "git"
},
{
"lessThan": "1503756fffe76d5aea2371a4b8dee20c3577bcfd",
"status": "affected",
"version": "ab4e4380d4e158486e595013a2635190e07e28ce",
"versionType": "git"
},
{
"lessThan": "7cc08f2f127b9a66f46ea918e34353811a7cb378",
"status": "affected",
"version": "ab4e4380d4e158486e595013a2635190e07e28ce",
"versionType": "git"
},
{
"lessThan": "28010791193a4503f054e8d69a950ef815deb539",
"status": "affected",
"version": "ab4e4380d4e158486e595013a2635190e07e28ce",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/bluetooth/hci_vhci.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"lessThan": "6.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17-rc5",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.105",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.46",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16.6",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17-rc5",
"versionStartIncluding": "6.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: vhci: Prevent use-after-free by removing debugfs files early\n\nMove the creation of debugfs files into a dedicated function, and ensure\nthey are explicitly removed during vhci_release(), before associated\ndata structures are freed.\n\nPreviously, debugfs files such as \"force_suspend\", \"force_wakeup\", and\nothers were created under hdev-\u003edebugfs but not removed in\nvhci_release(). Since vhci_release() frees the backing vhci_data\nstructure, any access to these files after release would result in\nuse-after-free errors.\n\nAlthough hdev-\u003edebugfs is later freed in hci_release_dev(), user can\naccess files after vhci_data is freed but before hdev-\u003edebugfs is\nreleased."
}
],
"providerMetadata": {
"dateUpdated": "2025-09-19T15:26:31.519Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bd75eba88e88d7b896b0c737b02a74a12afc235f"
},
{
"url": "https://git.kernel.org/stable/c/1503756fffe76d5aea2371a4b8dee20c3577bcfd"
},
{
"url": "https://git.kernel.org/stable/c/7cc08f2f127b9a66f46ea918e34353811a7cb378"
},
{
"url": "https://git.kernel.org/stable/c/28010791193a4503f054e8d69a950ef815deb539"
}
],
"title": "Bluetooth: vhci: Prevent use-after-free by removing debugfs files early",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-39861",
"datePublished": "2025-09-19T15:26:31.519Z",
"dateReserved": "2025-04-16T07:20:57.143Z",
"dateUpdated": "2025-09-19T15:26:31.519Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-39861\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-19T16:15:45.100\",\"lastModified\":\"2025-09-19T16:15:45.100\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: vhci: Prevent use-after-free by removing debugfs files early\\n\\nMove the creation of debugfs files into a dedicated function, and ensure\\nthey are explicitly removed during vhci_release(), before associated\\ndata structures are freed.\\n\\nPreviously, debugfs files such as \\\"force_suspend\\\", \\\"force_wakeup\\\", and\\nothers were created under hdev-\u003edebugfs but not removed in\\nvhci_release(). Since vhci_release() frees the backing vhci_data\\nstructure, any access to these files after release would result in\\nuse-after-free errors.\\n\\nAlthough hdev-\u003edebugfs is later freed in hci_release_dev(), user can\\naccess files after vhci_data is freed but before hdev-\u003edebugfs is\\nreleased.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1503756fffe76d5aea2371a4b8dee20c3577bcfd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/28010791193a4503f054e8d69a950ef815deb539\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7cc08f2f127b9a66f46ea918e34353811a7cb378\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd75eba88e88d7b896b0c737b02a74a12afc235f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…