310 lines
15 KiB
JSON
310 lines
15 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-2026-43134",
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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": "2026-05-01T14:12:55.988Z",
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"datePublished": "2026-05-06T11:27:21.541Z",
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"dateUpdated": "2026-10-19T19:16:21.882Z"
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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": "2026-08-05T12:26:10.307Z"
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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: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ\n\nThis adds a check for encryption key size upon receiving\nL2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which\nexpects L2CAP_CR_LE_BAD_KEY_SIZE."
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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:H/A:N",
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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 vulnerable request is an incoming Bluetooth LE L2CAP signaling packet from a nearby Bluetooth peer, so exploitation requires adjacent radio proximity rather than IP network or local shell access.\nAC:L - An attacker who can establish an LE link can send an L2CAP_LE_CONN_REQ with an insufficient encryption key size and reliably reach the missing check; there is no race or condition outside attacker control.\nPR:N - The attacker does not need privileges on the target system; Bluetooth pairing/encryption is a protocol precondition, not an OS privilege, and the vulnerable authorization decision is made from received peer traffic.\nUI:N - In a reasonable deployment with a listening LE L2CAP service and connectable device, exploitation is triggered by the adjacent peer’s protocol messages without requiring the victim to open a file, mount anything, or perform an action.\nS:U - The issue bypasses Bluetooth/L2CAP security policy within the same kernel and host Bluetooth service security authority, with no VM, sandbox, or hardware boundary escape.\nC:H - Accepting a channel despite an insufficient encryption key can expose all data carried by a protected LE Credit Based L2CAP service; for high-impact Bluetooth deployments, that can disclose sensitive application or device-control data.\nI:H - The same security bypass can allow an adjacent peer using inadequate encryption strength to send commands or modify state over a service that should have rejected the connection, giving high integrity impact in the protected service context.\nA:N - The bug is a missing key-size enforcement check and does not indicate memory corruption, panic, deadlock, resource exhaustion, or another availability failure."
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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/l2cap_core.c"
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],
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"versions": [
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{
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"version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
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"lessThan": "335071c0c3637064ec250481f589075db44fe4e6",
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"lessThan": "138d7eca445ef37a0333425d269ee59900ca1104",
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"status": "affected",
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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/l2cap_core.c"
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],
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"versions": [
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{
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"version": "3.14",
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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": "3.14",
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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": "5.10.252",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.202",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.165",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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{
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"version": "6.6.128",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.12.75",
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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": "6.18.16",
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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": "6.19.6",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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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"cpeApplicability": [
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"url": "https://git.kernel.org/stable/c/fa6ad76fa8623c0a50d529cd5726fa5d819a3be4"
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"url": "https://git.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecef"
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"url": "https://git.kernel.org/stable/c/481ea39b342c347b6ac029f3d418486280be4e45"
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{
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"url": "https://git.kernel.org/stable/c/ec91078e132179b04e0c3906b599816c056ceaad"
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"url": "https://git.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97"
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{
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"url": "https://git.kernel.org/stable/c/138d7eca445ef37a0333425d269ee59900ca1104"
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}
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],
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"title": "Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ",
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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-2026-43134",
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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": "2026-10-16T15:15:03.252855Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-326",
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"description": "CWE-326 Inadequate Encryption Strength"
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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": "2026-10-19T19:16:21.882Z"
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}
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}
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]
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}
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} |