239 lines
13 KiB
JSON
239 lines
13 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-2025-38303",
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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": "2025-04-16T04:51:24.002Z",
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"datePublished": "2025-07-10T07:42:14.728Z",
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"dateUpdated": "2026-10-21T12:37:00.173Z"
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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": "2026-10-21T12:37:00.173Z"
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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: eir: Fix possible crashes on eir_create_adv_data\n\neir_create_adv_data may attempt to add EIR_FLAGS and EIR_TX_POWER\nwithout checking if that would fit."
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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 overflow is driven entirely by locally-configured advertising data submitted over an AF_BLUETOOTH HCI control socket (MGMT_OP_ADD_ADVERTISING / MGMT_OP_ADD_EXT_ADV_DATA), so local system access is mandatory. No adjacent or remote Bluetooth peer supplies any of the data consumed by eir_create_adv_data(), since advertising payloads are outbound and locally authored.\nAC:L - The attacker deterministically controls every input to the overflow — the adv instance flags (MGMT_ADV_FLAG_TX_POWER without a managed-flags bit), the exact adv_data_len at the tlv_data_max_len ceiling, and the BR/EDR-disabled state (MGMT_OP_SET_BREDR) that makes the kernel prepend the unbudgeted LE_AD_NO_BREDR Flags AD. There is no race, no timing window, and no memory-layout precondition outside the attacker's influence.\nPR:L - The handlers lack HCI_MGMT_UNTRUSTED so the socket must be CAP_NET_ADMIN-trusted, but in the realistic Bluetooth deployments for this code (Android's non-root AID_BLUETOOTH service, ChromeOS/embedded/automotive BT daemons) that capability is held by an unprivileged, remotely-exposed, SELinux-confined daemon rather than by root. A compromised Bluetooth daemon — far short of full admin — is sufficient to reach the bug.\nUI:N - The attacker issues every mgmt command needed (set bredr off, add advertising with a max-length payload) from its own socket, and the overflow fires from the hci_cmd_sync_work kthread without any victim action. No pairing, connection, or user-initiated operation by another party is involved.\nS:U - The corruption occurs on the kernel stack of the Bluetooth command-sync worker, within the same kernel security authority as the vulnerable code. No VM, IOMMU, container, or sandbox boundary is crossed.\nC:H - In the extended-advertising path the inflated return value propagates into struct_size(pdu, data, len), so the HCI command skb is assembled from bytes beyond the 255-byte stack object, leaking adjacent kernel stack contents into the HCI command stream and to HCI monitor consumers; the legacy path similarly publishes hdev->adv_data_len = 34 with only 31 valid bytes. Combined with the stack-corruption primitive, this is leverageable for kernel memory disclosure.\nI:H - This is an out-of-bounds write past a fixed-size stack buffer, placing attacker-influenced bytes (0x02, EIR_TX_POWER, and a tx_power value the attacker can steer via the advertising parameters) into adjacent stack storage of the hci_cmd_sync_work frame. Per the OOB-write classification this is a control-flow-relevant corruption primitive, not a mere bad read.\nA:H - The commit is titled \"Fix possible crashes\" and the confirmed KASAN report on this code shows stack-out-of-bounds writes in eir_create_adv_data() from hci_cmd_sync_work. On stack-protector kernels overwriting past the buffer trips __stack_chk_fail and panics the machine; otherwise it oopses or corrupts the worker's frame, taking down the Bluetooth subsystem or 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/eir.c",
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"net/bluetooth/eir.h",
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"net/bluetooth/hci_sync.c"
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],
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"versions": [
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{
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"version": "01ce70b0a274bd76a5a311fb90d4d446d9bdfea1",
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"lessThan": "2d4588f55cc10fc228f3b46469dbfb3f0a8b13c8",
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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": "01ce70b0a274bd76a5a311fb90d4d446d9bdfea1",
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"lessThan": "e98ce4b70beab73563d82bd21821024140e6da06",
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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": "01ce70b0a274bd76a5a311fb90d4d446d9bdfea1",
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"lessThan": "2af40d795d3fb0ee5c074b7ac56ab22402aa6e4f",
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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": "01ce70b0a274bd76a5a311fb90d4d446d9bdfea1",
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"lessThan": "b9db0c27e73b7c8a19384a44af527edfda74ff3d",
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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": "01ce70b0a274bd76a5a311fb90d4d446d9bdfea1",
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"lessThan": "47c03902269aff377f959dc3fd94a9733aa31d6e",
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"status": "affected",
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"versionType": "git"
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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/eir.c",
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"net/bluetooth/eir.h",
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"net/bluetooth/hci_sync.c"
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],
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"versions": [
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{
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"version": "5.16",
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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": "5.16",
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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": "6.1.168",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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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": "6.12.34",
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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": "6.15.3",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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": "5.16",
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"versionEndExcluding": "6.1.168"
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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": "5.16",
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"versionEndExcluding": "6.6.160"
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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": "5.16",
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"versionEndExcluding": "6.12.34"
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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": "5.16",
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"versionEndExcluding": "6.15.3"
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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": "5.16",
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"versionEndExcluding": "6.16"
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}
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]
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}
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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/2d4588f55cc10fc228f3b46469dbfb3f0a8b13c8"
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},
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{
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"url": "https://git.kernel.org/stable/c/e98ce4b70beab73563d82bd21821024140e6da06"
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},
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{
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"url": "https://git.kernel.org/stable/c/2af40d795d3fb0ee5c074b7ac56ab22402aa6e4f"
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},
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{
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"url": "https://git.kernel.org/stable/c/b9db0c27e73b7c8a19384a44af527edfda74ff3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/47c03902269aff377f959dc3fd94a9733aa31d6e"
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}
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],
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"title": "Bluetooth: eir: Fix possible crashes on eir_create_adv_data",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-38303",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:49:29.846337Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T21:52:13.965Z"
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}
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}
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]
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}
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} |