180 lines
10 KiB
JSON
180 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-2026-97428",
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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": "2026-09-24T14:53:16.868Z",
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"datePublished": "2026-09-24T16:03:41.103Z",
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"dateUpdated": "2026-10-21T12:52:46.339Z"
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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": "2026-10-21T12:52:46.339Z"
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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\ndrm/amdgpu: harden FRU PIA parsing with bounded helpers\n\nReplace the open-coded TLV walk with fru_pia_advance()\nand fru_pia_copy_field() helpers that bound every read\nby the actual EEPROM data length, preventing out-of-bounds\nreads on truncated or malformed FRU data."
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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:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.7,
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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 malformed IPMI FRU Product Info Area TLV lengths (pia[addr] & 0x3F) are consumed by amdgpu_fru_get_product_info() after amdgpu_eeprom_read() on adev->pm.fru_eeprom_i2c_bus, reached from amdgpu_pci_probe() → amdgpu_driver_load_kms() → amdgpu_device_init() → amdgpu_device_ip_init(). Those bytes come from the GPU I2C FRU EEPROM, not a network protocol or USB descriptor.\nAC:L - A FRU image with valid Common Header and PIA checksums but TLV lengths that extend past the kmalloc'd pia buffer makes the pre-fix memcpy of manufacturer_name, product_name, product_number, serial, and fru_id overread on every probe. The attacker programs those EEPROM bytes; skipped Product Version/Asset Tag advances also lack a bounds check. No race.\nPR:N - amdgpu_fru_get_product_info() runs from amdgpu_device_ip_init() during amdgpu_pci_probe() with no capable() or credential check. is_fru_eeprom_supported() only matches server SKUs (Vega20 D161/D163, Aldebaran, SMU 13.0.6/13.0.14) and skips SR-IOV VFs and APUs; a crafted FRU on a supported GPU is parsed without a host account.\nUI:N - amdgpu_pci_probe() calls amdgpu_fru_get_product_info() automatically while binding a supported AMD server GPU; no victim must open a DRM node, mount media, or write sysfs.\nS:U - The memcpy overread of the kzalloc'd pia buffer and the later 0444 sysfs emit stay in this host kernel's amdgpu driver. is_fru_eeprom_supported() returns false for amdgpu_sriov_vf(), so this is not a guest-to-host or IOMMU boundary crossing.\nC:H - Pre-fix memcpy(fru_info->product_name, pia+addr+1, min(64, pia[addr]&0x3F)) and the manufacturer_name/product_number/serial/fru_id copies do not cap the length to remaining PIA bytes, so a 6-bit length near the end of pia reads up to 63 bytes of adjacent kernel heap. amdgpu_fru_product_name_show and sibling 0444 attributes then emit those fields; that is not a few-byte leak.\nI:N - Each memcpy destination is min'd against sizeof(fru_info->manufacturer_name/product_name/product_number/serial/fru_id), so the TLV walk does not write past those arrays or other kernel objects. This path has no out-of-bounds write or control-flow hijack primitive.\nA:H - A short PIA (size = buf[1]*8, e.g. 8 bytes) plus a product_name field length of 63 makes memcpy() walk tens of bytes past the kzalloc'd pia object into unmapped or poisoned slab and oops inside amdgpu_fru_get_product_info() during probe."
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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/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c"
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],
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"versions": [
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{
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"version": "0dbf2c56262532fbd498f590c91c4085413b8829",
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"lessThan": "567d7c3f93f8d6bdc946a557a160ee1c42cfae91",
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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": "0dbf2c56262532fbd498f590c91c4085413b8829",
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"lessThan": "813311512505e95e4e3c898ff94b11886a15e494",
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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": "0dbf2c56262532fbd498f590c91c4085413b8829",
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"lessThan": "4396d74b0c7304946ee343a6611ac6dbc0bfbf78",
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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": "0dbf2c56262532fbd498f590c91c4085413b8829",
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"lessThan": "c990c05eb6c74c98d1ff3acf67a19015312820b7",
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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/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c"
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],
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"versions": [
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{
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"version": "6.2",
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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": "6.2",
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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": "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",
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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": "6.2",
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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": "6.2",
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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": "6.2",
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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": "6.2",
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"versionEndExcluding": "7.2"
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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/567d7c3f93f8d6bdc946a557a160ee1c42cfae91"
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},
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{
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"url": "https://git.kernel.org/stable/c/813311512505e95e4e3c898ff94b11886a15e494"
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},
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{
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"url": "https://git.kernel.org/stable/c/4396d74b0c7304946ee343a6611ac6dbc0bfbf78"
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},
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{
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"url": "https://git.kernel.org/stable/c/c990c05eb6c74c98d1ff3acf67a19015312820b7"
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}
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],
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"title": "drm/amdgpu: harden FRU PIA parsing with bounded helpers",
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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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} |