185 lines
9.5 KiB
JSON
185 lines
9.5 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-2026-97965",
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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": "2026-09-25T10:18:58.206Z",
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"datePublished": "2026-09-25T10:23:07.952Z",
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"dateUpdated": "2026-10-21T12:53:54.233Z"
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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": "2026-10-21T12:53:54.233Z"
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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\nvxlan: initialize _md in vxlan_xmit_one()\n\nIf a VXLAN device is configured with both VXLAN_F_COLLECT_METADATA and\nVXLAN_F_GBP, and a packet is transmitted through it using an external\nip_tunnel_info that lacks the IP_TUNNEL_VXLAN_OPT_BIT flag, md is left\npointing to the uninitialized _md stack variable:\n\n if (test_bit(IP_TUNNEL_VXLAN_OPT_BIT, info->key.tun_flags)) {\n if (info->options_len < sizeof(*md))\n goto drop;\n md = ip_tunnel_info_opts(info);\n }\n\nBecause IP_TUNNEL_VXLAN_OPT_BIT is not set, md is not updated and remains\npointing to _md. Later, vxlan_build_skb() is called with md, which\neventually calls vxlan_build_gbp_hdr():\n\n if (vxflags & VXLAN_F_GBP)\n vxlan_build_gbp_hdr(vxh, md);\n\nInside vxlan_build_gbp_hdr(), md->gbp is read:\n\n if (!md->gbp)\n return;\n gbp = (struct vxlanhdr_gbp *)vxh;\n ...\n if (md->gbp & VXLAN_GBP_DONT_LEARN)\n gbp->dont_learn = 1;\n\nIf the stack contains garbage, this causes:\n1) VXLAN_HF_GBP flag to be spuriously set in the VXLAN header.\n2) gbp->dont_learn and gbp->policy_applied to be set from stack bits.\n3) gbp->policy_id to receive 16 bits of uninitialized kernel stack data,\n leaking it onto the wire.\n\nFix this by zero-initializing _md. If IP_TUNNEL_VXLAN_OPT_BIT is not\npresent, md->gbp remains 0, and vxlan_build_gbp_hdr() returns early\nwithout modifying the VXLAN header."
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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/net/vxlan/vxlan_core.c"
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],
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"versions": [
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{
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"version": "ee122c79d4227f6ec642157834b6a90fcffa4382",
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"lessThan": "fb78beb64e0e79557e4cd7cd17fea744bb6f01d9",
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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": "ee122c79d4227f6ec642157834b6a90fcffa4382",
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"lessThan": "0d13b5a413bffc8718b3821b78537ccc6596c233",
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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": "ee122c79d4227f6ec642157834b6a90fcffa4382",
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"lessThan": "bfb74c48ac2d31476d5e09cf9658844508d2608a",
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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": "ee122c79d4227f6ec642157834b6a90fcffa4382",
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"lessThan": "081f22177d9d12b1e381b787f203cd5f47508187",
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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": "ee122c79d4227f6ec642157834b6a90fcffa4382",
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"lessThan": "be83178bfc44588f6e3adb827ed874c683193466",
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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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"drivers/net/vxlan/vxlan_core.c"
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],
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"versions": [
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{
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"version": "4.3",
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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": "4.3",
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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": "6.12.111",
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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": "6.18.53",
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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": "7.2.7",
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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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{
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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": "4.3",
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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": "4.3",
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"versionEndExcluding": "6.12.111"
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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": "4.3",
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"versionEndExcluding": "6.18.53"
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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": "4.3",
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"versionEndExcluding": "7.2.7"
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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": "4.3",
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"versionEndExcluding": "7.3"
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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/fb78beb64e0e79557e4cd7cd17fea744bb6f01d9"
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},
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{
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"url": "https://git.kernel.org/stable/c/0d13b5a413bffc8718b3821b78537ccc6596c233"
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},
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{
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"url": "https://git.kernel.org/stable/c/bfb74c48ac2d31476d5e09cf9658844508d2608a"
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},
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{
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"url": "https://git.kernel.org/stable/c/081f22177d9d12b1e381b787f203cd5f47508187"
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},
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{
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"url": "https://git.kernel.org/stable/c/be83178bfc44588f6e3adb827ed874c683193466"
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}
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],
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"title": "vxlan: initialize _md in vxlan_xmit_one()",
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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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} |