222 lines
13 KiB
JSON
222 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-2026-89583",
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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": "2026-09-11T19:38:34.728Z",
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"datePublished": "2026-09-11T19:44:49.094Z",
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"dateUpdated": "2026-10-19T08:49:16.094Z"
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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": "2026-10-19T08:49:16.094Z"
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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 OOB read in eir_get_service_data()\n\neir_get_service_data() walks the advertising data for a Service Data\nfield with a matching UUID. On a mismatch it advances:\n\n eir += dlen;\n eir_len -= dlen;\n\neir_get_data() reports dlen as the field's data length, but the field\nspans dlen + 2 bytes once its length and type bytes count, and more\nwhen non-Service-Data fields were skipped to reach it. The pointer\nlands correctly on the next field. eir_len does not, and the shortfall\ncompounds across fields until eir_get_data() reads the length and type\nbytes of a \"field\" past the end of the buffer.\n\nFor an ISO broadcast sink that buffer is hcon->le_per_adv_data[], filled\nfrom the periodic advertising reports of a remote broadcaster. A PA\npayload packed with mismatching Service Data fields walks off the array\ninto the rest of struct hci_conn. A drifted field that matches the BAA\nUUID puts those bytes in iso_pi(sk)->base, where user space reads them\nback with getsockopt(BT_ISO_BASE).\n\nRecompute eir_len from the end of the buffer each iteration."
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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:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 8.1,
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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:A - The OOB read is in eir_get_service_data() parsing LE periodic advertising. An ISO broadcast sink copies HCI_EV_LE_PER_ADV_REPORT payloads from a remote broadcaster into hcon->le_per_adv_data[] via iso_connect_ind(), which is an adjacent Bluetooth radio path, not IP or a local-only syscall.\nAC:L - An in-range attacker fully controls the PA payload and can pack mismatching Service Data fields to inflate eir_len, then a trailing BAA-UUID field whose declared length extends past the buffer; triggering is deterministic with no race or layout the attacker cannot influence.\nPR:N - Periodic advertising is unauthenticated connectionless LE traffic; iso_connect_ind() parses PA reports with no pairing, HCI authentication, or capability check, and iso_sock_create() has no CAP_NET_ADMIN gate, so the attacker needs no Linux credentials on the victim.\nUI:N - LE Audio/Auracast stacks keep ISO broadcast-sink listeners during normal operation; once PA sync exists, iso_connect_ind() parses each HCI_EV_LE_PER_ADV_REPORT automatically and returns HCI_LM_ACCEPT without further user clicks, pairing, or setup.\nS:U - The out-of-bounds read of struct hci_conn and the copy into the ISO socket BASE buffer remain in the host kernel Bluetooth stack and do not cross a VM, container, or IOMMU security boundary.\nC:H - Inflated eir_len lets a matching BAA (0x1851) Service Data field extend past the 1650-byte le_per_adv_data[] into the rest of hci_conn; up to BASE_MAX_LENGTH (248) bytes are memcpy'd into iso_pi(sk)->base and returned via getsockopt(BT_ISO_BASE), leaking kernel pointers and adjacent object bytes.\nI:N - This is an out-of-bounds read only; the memcpy into iso_pi(sk)->base is capped by BASE_MAX_LENGTH, and there is no out-of-bounds write, use-after-free, or control-flow hijack primitive.\nA:H - Continuing the EIR walk with an overstated remaining length can read hundreds of bytes past le_per_adv_data[] into adjacent slab or unmapped memory, causing a kernel oops or KASAN panic that the attacker can retrigger with further PA reports."
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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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],
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"versions": [
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{
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"version": "8f9ae5b3ae80f168a6224529e3787f4fb27f299a",
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"lessThan": "b6902adf81ea2ce14b1040dd97b6980050a8125a",
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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": "8f9ae5b3ae80f168a6224529e3787f4fb27f299a",
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"lessThan": "1a28aae7f1fc8c06c0d02f153541be4fc7bacb74",
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"status": "affected",
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"versionType": "git"
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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": "8f9ae5b3ae80f168a6224529e3787f4fb27f299a",
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"lessThan": "c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50",
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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": "8f9ae5b3ae80f168a6224529e3787f4fb27f299a",
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"lessThan": "bb56e97bd67614238c1c0a4084704ccadbb875b4",
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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": "8f9ae5b3ae80f168a6224529e3787f4fb27f299a",
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"lessThan": "4beb198bc59b242404a47c21990bc84165052c8a",
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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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],
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"versions": [
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{
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"version": "5.19",
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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": "5.19",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.109",
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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": "6.18.50",
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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": "7.2.4",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.1.188"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b6902adf81ea2ce14b1040dd97b6980050a8125a"
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},
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{
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"url": "https://git.kernel.org/stable/c/1a28aae7f1fc8c06c0d02f153541be4fc7bacb74"
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},
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{
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"url": "https://git.kernel.org/stable/c/815fc98c227a78cbd93d4c29f2833705b7c2bc0f"
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},
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{
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"url": "https://git.kernel.org/stable/c/c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50"
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},
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{
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"url": "https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4"
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},
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{
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"url": "https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a"
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}
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],
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"title": "Bluetooth: eir: Fix OOB read in eir_get_service_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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}
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} |