133 lines
7.0 KiB
JSON
133 lines
7.0 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-79982",
|
|
"assignerOrgId": "e2e69745-5e70-4e92-8431-deb5529a81ad",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "zephyr",
|
|
"dateReserved": "2026-08-25T16:06:38.229Z",
|
|
"datePublished": "2026-10-23T19:56:19.432Z",
|
|
"dateUpdated": "2026-11-04T05:01:26.698Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "e2e69745-5e70-4e92-8431-deb5529a81ad",
|
|
"shortName": "zephyr",
|
|
"dateUpdated": "2026-11-04T05:01:26.698Z"
|
|
},
|
|
"title": "Out-of-bounds write in the USB Bluetooth HCI transport class when a controller-to-host HCI packet exceeds the bulk endpoint maximum packet size",
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "The Bluetooth HCI USB transport class of the new USB device stack, subsys/usb/device_next/class/bt_hci.c, copies every controller-to-host HCI packet into a USB transfer buffer before enqueuing it on an endpoint. bt_hci_tx_sync_in() allocated that buffer from bt_hci_ep_pool, a fixed pool whose slots are only USBD_MAX_BULK_MPS bytes (64 on full-speed-only builds), and then performed net_buf_add_mem(buf, bt_buf->data, bt_buf->len) with no length check. HCI event and ACL buffers are sized by CONFIG_BT_BUF_EVT_RX_SIZE and CONFIG_BT_BUF_ACL_RX_SIZE and can be far larger, so the copy runs past the end of the 64-byte slot into the adjacent slots and into whatever follows the statically allocated pool.\n\nThe device runs the local Bluetooth controller in raw HCI mode (CONFIG_BT_HCI_RAW), so the oversized packets originate over the air. With the HCI buffer sizes recommended for full-featured controllers, an unauthenticated attacker within Bluetooth range can supply the overflowing bytes: a connected peer that negotiates Data Length Extension can send ACL fragments up to CONFIG_BT_CTLR_DATA_LENGTH_MAX bytes, and an attacker that merely broadcasts extended advertising data reaches the same path through LE Extended Advertising Report events, which the controller fragments only to CONFIG_BT_BUF_EVT_RX_SIZE. In the stock configuration the overflow is already reached without any radio traffic: the mandatory Read Supported Commands command-complete event is 70 bytes and overruns the 64-byte slot by six bytes on every host initialization.\n\nBecause net_buf_add_mem() validates tailroom only through an assertion unless CONFIG_NET_BUF_HARDENING is enabled, builds with CONFIG_ASSERT=n — the usual production setting — silently corrupt memory adjacent to the USB buffer pool with attacker-chosen contents, which on a target without memory protection between subsystems can lead to arbitrary code execution. Builds with assertions enabled fail the assertion instead and panic, giving a remotely triggerable denial of service. The fix introduces a separate bt_hci_tx_pool sized to MAX(BT_BUF_ACL_RX_SIZE, BT_BUF_EVT_RX_SIZE) for the controller-to-host direction while leaving the host-to-device pool at the endpoint packet size, which is already bounds-checked during reassembly."
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"vendor": "zephyrproject",
|
|
"product": "zephyr",
|
|
"collectionURL": "https://github.com/zephyrproject-rtos/zephyr",
|
|
"packageName": "zephyr",
|
|
"defaultStatus": "unaffected",
|
|
"programFiles": [
|
|
"subsys/usb/device_next/class/bt_hci.c"
|
|
],
|
|
"programRoutines": [
|
|
{
|
|
"name": "bt_hci_tx_sync_in"
|
|
}
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "3.3.0",
|
|
"status": "affected",
|
|
"versionType": "semver",
|
|
"lessThan": "4.3.2"
|
|
},
|
|
{
|
|
"version": "4.4.0",
|
|
"status": "affected",
|
|
"versionType": "semver",
|
|
"lessThan": "4.5.0"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://github.com/zephyrproject-rtos/zephyr/commit/0419defd2391652edc27689d206fcd9c48439d4a",
|
|
"name": "Fix commit",
|
|
"tags": [
|
|
"patch"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w5px-w97v-c3hj",
|
|
"name": "GHSA-w5px-w97v-c3hj"
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"format": "CVSS",
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
|
|
"baseScore": 8.8,
|
|
"baseSeverity": "HIGH"
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"description": "bounds",
|
|
"cweId": "CWE-787",
|
|
"type": "CWE"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"x_generator": {
|
|
"engine": "cvelib 1.8.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2026-11-02T15:55:21.632059Z",
|
|
"id": "CVE-2026-79982",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-11-02T15:56:29.127Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |