195 lines
10 KiB
JSON
195 lines
10 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-2026-74629",
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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": "2026-08-15T05:44:03.921Z",
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"datePublished": "2026-08-22T15:32:10.861Z",
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"dateUpdated": "2026-10-16T19:06:03.413Z"
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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": "2026-08-25T05:40:53.253Z"
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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\nnet/dibs: Correct freeing of dmb_clientid_arr\n\nA dibs device interrupt handler can be active after dibs_dev_del() and\nmay still access dmb_clientid_arr. (UAF)\n\nIn case of a failure in dibs_dev_add() being called by dibs_lo_dev_probe()\ndmb_clientid_arr is freed twice (double free).\n\nFree dmb_clientid_arr in dibs_dev_release() after last reference is gone.\nNote that allocating in dibs_dev_add() instead of dibs_dev_alloc() is ok\nfor now, because no dmbs can be registered before dibs_dev_add()."
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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:H",
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"baseScore": 8.8,
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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:A - The UAF is hit when an ISM interrupt handler reads dmb_clientid_arr during SMC-D data transfer from a co-located peer on the same IBM Z CPC/HiperSockets domain; this is an adjacent-network attack surface, not arbitrary Internet reachability.\nAC:L - An attacker controls the IRQ side by sustaining SMC-D transfers that keep firing ism_handle_irq while device teardown runs; no rare memory layout or victim-specific state beyond concurrent traffic during hot-unplug/module removal is required.\nPR:N - Exploitation requires only an established SMC-D peer sending data to the victim; no Linux capabilities, root, or user-namespace privileges on the victim host are needed to drive the interrupt path that accesses the freed array.\nUI:N - No victim user action is required; the bug is triggered by remote SMC-D traffic coinciding with kernel driver teardown, not by opening files, mounting filesystems, or other interactive steps.\nS:U - Successful exploitation corrupts kernel heap memory and enables privilege escalation within the same kernel security domain; it does not by itself cross a VM/hypervisor or IOMMU boundary to another authority.\nC:H - The use-after-free of dmb_clientid_arr in ism_handle_irq permits out-of-bounds or attacker-influenced kernel heap reads that can disclose sensitive memory, including pointers usable in further exploitation.\nI:H - UAF on a heap-allocated client-ID lookup table in IRQ context can be turned into arbitrary kernel memory writes and control-flow hijacking via heap grooming and reuse of the freed allocation.\nA:H - Concurrent access to freed dmb_clientid_arr during interrupt handling can cause kernel oops/panic or wedged SMC-D processing, producing complete loss of availability on affected IBM Z systems."
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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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"drivers/dibs/dibs_loopback.c",
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"drivers/dibs/dibs_main.c"
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],
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"versions": [
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{
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"version": "cc21191b584c6f7836b0f10774f8278b7cbfba10",
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"lessThan": "ece6426b61241e9bfb41aa131f235168f55229b1",
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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": "cc21191b584c6f7836b0f10774f8278b7cbfba10",
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"lessThan": "7a1df20a8d2cc89e3a442b6e0b43b1cacde8d403",
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"status": "affected",
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},
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{
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"lessThan": "9e6869be49064915edb6c8776b27c376cfdb0df5",
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"status": "affected",
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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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"drivers/dibs/dibs_loopback.c",
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"drivers/dibs/dibs_main.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "6.18.45",
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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": "7.1.9",
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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": "6.18",
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"versionEndExcluding": "6.18.45"
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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": "6.18",
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"versionEndExcluding": "7.1.9"
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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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}
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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/ece6426b61241e9bfb41aa131f235168f55229b1"
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},
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{
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"url": "https://git.kernel.org/stable/c/7a1df20a8d2cc89e3a442b6e0b43b1cacde8d403"
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},
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{
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"url": "https://git.kernel.org/stable/c/9e6869be49064915edb6c8776b27c376cfdb0df5"
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}
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],
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"title": "net/dibs: Correct freeing of dmb_clientid_arr",
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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-2026-74629",
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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": "2026-10-16T19:02:53.858815Z"
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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": "2026-10-16T19:06:03.413Z"
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}
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}
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]
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}
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} |