396 lines
23 KiB
JSON
396 lines
23 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2023-52623",
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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": "2024-03-06T09:52:12.090Z",
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"datePublished": "2024-03-26T17:19:24.425Z",
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"dateUpdated": "2026-08-05T09:10:46.519Z"
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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": "2026-08-05T09:10:46.519Z"
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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\nSUNRPC: Fix a suspicious RCU usage warning\n\nI received the following warning while running cthon against an ontap\nserver running pNFS:\n\n[ 57.202521] =============================\n[ 57.202522] WARNING: suspicious RCU usage\n[ 57.202523] 6.7.0-rc3-g2cc14f52aeb7 #41492 Not tainted\n[ 57.202525] -----------------------------\n[ 57.202525] net/sunrpc/xprtmultipath.c:349 RCU-list traversed in non-reader section!!\n[ 57.202527]\n other info that might help us debug this:\n\n[ 57.202528]\n rcu_scheduler_active = 2, debug_locks = 1\n[ 57.202529] no locks held by test5/3567.\n[ 57.202530]\n stack backtrace:\n[ 57.202532] CPU: 0 PID: 3567 Comm: test5 Not tainted 6.7.0-rc3-g2cc14f52aeb7 #41492 5b09971b4965c0aceba19f3eea324a4a806e227e\n[ 57.202534] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS unknown 2/2/2022\n[ 57.202536] Call Trace:\n[ 57.202537] <TASK>\n[ 57.202540] dump_stack_lvl+0x77/0xb0\n[ 57.202551] lockdep_rcu_suspicious+0x154/0x1a0\n[ 57.202556] rpc_xprt_switch_has_addr+0x17c/0x190 [sunrpc ebe02571b9a8ceebf7d98e71675af20c19bdb1f6]\n[ 57.202596] rpc_clnt_setup_test_and_add_xprt+0x50/0x180 [sunrpc ebe02571b9a8ceebf7d98e71675af20c19bdb1f6]\n[ 57.202621] ? rpc_clnt_add_xprt+0x254/0x300 [sunrpc ebe02571b9a8ceebf7d98e71675af20c19bdb1f6]\n[ 57.202646] rpc_clnt_add_xprt+0x27a/0x300 [sunrpc ebe02571b9a8ceebf7d98e71675af20c19bdb1f6]\n[ 57.202671] ? __pfx_rpc_clnt_setup_test_and_add_xprt+0x10/0x10 [sunrpc ebe02571b9a8ceebf7d98e71675af20c19bdb1f6]\n[ 57.202696] nfs4_pnfs_ds_connect+0x345/0x760 [nfsv4 c716d88496ded0ea6d289bbea684fa996f9b57a9]\n[ 57.202728] ? __pfx_nfs4_test_session_trunk+0x10/0x10 [nfsv4 c716d88496ded0ea6d289bbea684fa996f9b57a9]\n[ 57.202754] nfs4_fl_prepare_ds+0x75/0xc0 [nfs_layout_nfsv41_files e3a4187f18ae8a27b630f9feae6831b584a9360a]\n[ 57.202760] filelayout_write_pagelist+0x4a/0x200 [nfs_layout_nfsv41_files e3a4187f18ae8a27b630f9feae6831b584a9360a]\n[ 57.202765] pnfs_generic_pg_writepages+0xbe/0x230 [nfsv4 c716d88496ded0ea6d289bbea684fa996f9b57a9]\n[ 57.202788] __nfs_pageio_add_request+0x3fd/0x520 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202813] nfs_pageio_add_request+0x18b/0x390 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202831] nfs_do_writepage+0x116/0x1e0 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202849] nfs_writepages_callback+0x13/0x30 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202866] write_cache_pages+0x265/0x450\n[ 57.202870] ? __pfx_nfs_writepages_callback+0x10/0x10 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202891] nfs_writepages+0x141/0x230 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202913] do_writepages+0xd2/0x230\n[ 57.202917] ? filemap_fdatawrite_wbc+0x5c/0x80\n[ 57.202921] filemap_fdatawrite_wbc+0x67/0x80\n[ 57.202924] filemap_write_and_wait_range+0xd9/0x170\n[ 57.202930] nfs_wb_all+0x49/0x180 [nfs 6c976fa593a7c2976f5a0aeb4965514a828e6902]\n[ 57.202947] nfs4_file_flush+0x72/0xb0 [nfsv4 c716d88496ded0ea6d289bbea684fa996f9b57a9]\n[ 57.202969] __se_sys_close+0x46/0xd0\n[ 57.202972] do_syscall_64+0x68/0x100\n[ 57.202975] ? do_syscall_64+0x77/0x100\n[ 57.202976] ? do_syscall_64+0x77/0x100\n[ 57.202979] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n[ 57.202982] RIP: 0033:0x7fe2b12e4a94\n[ 57.202985] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 80 3d d5 18 0e 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 44 c3 0f 1f 00 48 83 ec 18 89 7c 24 0c e8 c3\n[ 57.202987] RSP: 002b:00007ffe857ddb38 EFLAGS: 00000202 ORIG_RAX: 0000000000000003\n[ 57.202989] RAX: ffffffffffffffda RBX: 00007ffe857dfd68 RCX: 00007fe2b12e4a94\n[ 57.202991] RDX: 0000000000002000 RSI: 00007ffe857ddc40 RDI: 0000000000000003\n[ 57.202992] RBP: 00007ffe857dfc50 R08: 7fffffffffffffff R09: 0000000065650f49\n[ 57.202993] R10: 00007f\n---truncated---"
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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 vulnerable path runs in the NFS/SUNRPC client during pNFS DS connect and session trunking (`rpc_clnt_setup_test_and_add_xprt` / `rpc_clnt_test_and_add_xprt`), reached via local file operations on an NFS mount (e.g. writeback/close), not via an unauthenticated remote service like nfsd/ksmbd.\nAC:L - An attacker who can drive multipath/trunking I/O also influences transport add and remove (failed trunking calls `rpc_clnt_xprt_switch_remove_xprt`; connection failure paths delete xprts), so both sides of the RCU list race are attacker-driven rather than depending on an uncontrolled external condition.\nPR:L - Triggering requires only an unprivileged process with access to an already-mounted NFSv4.1/pNFS share (common on HPC/enterprise clients); mounting may need admin, but exploitation itself does not require init-namespace root or capabilities beyond a normal user on the mount.\nUI:N - The attacker triggers the buggy has_addr walk through their own reads/writes/closes on the NFS mount; no separate victim action is required once the share is available.\nS:U - Impact is a host-kernel use-after-free of `rpc_xprt` within the same security authority; there is no VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - Missing RCU read-side protection while iterating an RCU list whose entries are removed with `list_del_rcu` and freed with `kfree_rcu` yields a classic slab UAF; reclaim of the freed `rpc_xprt` enables disclosure of kernel heap contents (the walk reads `pos->addr` and `address_strings`).\nI:H - The same UAF on `rpc_xprt` is heap-sprayable to obtain attacker-controlled object contents and corruption/control-flow hijack primitives, consistent with scoring other kernel UAFs as High integrity.\nA:H - Use-after-free or wild dereference during the unlocked RCU-list walk can oops/panic the kernel, and CONFIG_PROVE_RCU builds also WARN on the missing lock (panic_on_warn converts that to DoS)."
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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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"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/sunrpc/xprtmultipath.c"
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},
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},
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{
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},
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},
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"version": "6.8",
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"status": "unaffected",
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}
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}
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"url": "https://git.kernel.org/stable/c/f8cf4dabbdcb8bef85335b0ed7ad5b25fd82ff56"
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"url": "https://git.kernel.org/stable/c/e8ca3e73301e23e8c0ac0ce2e6bac4545cd776e0"
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"url": "https://git.kernel.org/stable/c/8f860c8407470baff2beb9982ad6b172c94f1d0a"
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"url": "https://git.kernel.org/stable/c/31b62908693c90d4d07db597e685d9f25a120073"
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}
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],
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"title": "SUNRPC: Fix a suspicious RCU usage warning",
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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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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-22",
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"lang": "en",
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"description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
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}
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]
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}
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],
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"metrics": [
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{
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-04T15:58:01.744367Z",
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"id": "CVE-2023-52623",
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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": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2025-05-22T13:30:00.769Z"
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}
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},
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{
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"providerMetadata": {
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"shortName": "CVE",
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"dateUpdated": "2024-08-02T23:03:21.223Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fece80a2a6718ed58487ce397285bb1b83a3e54e",
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"tags": [
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"x_transferred"
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]
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},
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{
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