232 lines
12 KiB
JSON
232 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-68392",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-30T09:28:09.388Z",
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"datePublished": "2026-08-10T12:04:11.543Z",
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"dateUpdated": "2026-08-23T12:46:21.017Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-23T12:46:21.017Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix locking in unpair_device/disconnect_sync\n\nDereferencing RCU-protected pointers outside critical sections is\ninvalid and may lead to UAF.\n\nTake hdev->lock for hci_conn lookup and hci_abort_conn(). Don't use RCU\nto ensure the conn is fully initialized at this point."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is entered by a local process sending MGMT_OP_DISCONNECT/MGMT_OP_UNPAIR_DEVICE on an AF_BLUETOOTH/BTPROTO_HCI socket bound to HCI_CHANNEL_CONTROL, and the freeing side is drivable locally via /dev/vhci events or ioctl(HCIDEVDOWN)/hci_conn_hash_flush; no over-the-air access is required.\nAC:L - The attacker controls both sides of the race — repeatedly queuing the mgmt command while tearing the connection down (vhci-injected disconnect-complete, HCIDEVDOWN, or connection timeout) — and can retry indefinitely, so the window is reached reliably.\nPR:L - The mgmt command needs a trusted control socket, but that capability is routinely held by the Bluetooth daemon and exposed to unprivileged session users through BlueZ Disconnect/RemoveDevice D-Bus methods, so an ordinary local user can drive the path with attacker-chosen addresses.\nUI:N - Both the mgmt command and the concurrent connection teardown are initiated programmatically by the attacker; no victim action such as pairing confirmation or opening a file is needed.\nS:U - The corruption is confined to kernel heap objects managed by the Bluetooth subsystem within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - hci_abort_conn() dereferences the freed hci_conn (conn->hdev, conn->abort_reason, conn->handle) after it has been unlinked and released, so an attacker who reclaims the slab with controlled data obtains a read primitive over kernel memory and can leak pointers.\nI:H - The use-after-free is not read-only: hci_abort_conn() stores the attacker-reachable reason byte into conn->abort_reason and hci_conn_get() increments a refcount inside the freed object, giving a write primitive into reclaimed heap memory that is leverageable for control-flow hijack.\nA:H - Dereferencing a freed or partially initialized hci_conn and then queuing abort_conn_sync on it produces slab-use-after-free oopses, refcount underflow, and kernel panics, crashing the system."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bluetooth/mgmt.c"
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],
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"versions": [
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{
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"version": "7fe4d391e937c2f048a43ff4b421e677f10d83c0",
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"lessThan": "74f3e6e21ebc6c418d348f8ce68aef6fe6d82c82",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "249c88e7fb45b6b705040c5af4bd0d0f2bc9735c",
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"lessThan": "8bc83f9ef6789571f399ff631a2a14a12b6d8585",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "227a0cdf4a028a73dc256d0f5144b4808d718893",
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"lessThan": "579faba5ede6df6b7f36777c431dc8dcf9d272e7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "227a0cdf4a028a73dc256d0f5144b4808d718893",
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"lessThan": "ca58ad287bfc5b9d31a72ecb8650289df2b57250",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "227a0cdf4a028a73dc256d0f5144b4808d718893",
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"lessThan": "b11511006f9e17000de3f4cadee451364f658ca3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "227a0cdf4a028a73dc256d0f5144b4808d718893",
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"lessThan": "16cd66443957e4ad42155c6fec401012f600c6f8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58afdc9b18871eb1d461c725be9e9f3f44a39aeb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.6.51",
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"lessThan": "6.6.148",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.10.10",
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"lessThan": "6.11",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bluetooth/mgmt.c"
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],
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"versions": [
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{
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"version": "6.11",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.11",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.148",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.101",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.42",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6.51",
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"versionEndExcluding": "6.6.148"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.11",
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"versionEndExcluding": "6.12.101"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.11",
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"versionEndExcluding": "7.2"
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]
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]
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/74f3e6e21ebc6c418d348f8ce68aef6fe6d82c82"
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},
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{
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"url": "https://git.kernel.org/stable/c/8bc83f9ef6789571f399ff631a2a14a12b6d8585"
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},
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{
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"url": "https://git.kernel.org/stable/c/579faba5ede6df6b7f36777c431dc8dcf9d272e7"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca58ad287bfc5b9d31a72ecb8650289df2b57250"
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},
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{
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"url": "https://git.kernel.org/stable/c/b11511006f9e17000de3f4cadee451364f658ca3"
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},
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{
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"url": "https://git.kernel.org/stable/c/16cd66443957e4ad42155c6fec401012f600c6f8"
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}
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],
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"title": "Bluetooth: mgmt: fix locking in unpair_device/disconnect_sync",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |