314 lines
16 KiB
JSON
314 lines
16 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-2025-21785",
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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": "2024-12-29T08:45:45.765Z",
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"datePublished": "2025-02-27T02:18:25.938Z",
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"dateUpdated": "2026-10-15T21:51:52.980Z"
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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": "2026-08-05T11:54:23.832Z"
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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\narm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array\n\nThe loop that detects/populates cache information already has a bounds\ncheck on the array size but does not account for cache levels with\nseparate data/instructions cache. Fix this by incrementing the index\nfor any populated leaf (instead of any populated level)."
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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 defect lives in arm64 CPU cacheinfo initialization, reached only through local CPU bring-up (`update_siblings_masks()`) and the CPUHP_AP_BASE_CACHEINFO_ONLINE hotplug callback on the machine itself; there is no network, adjacent-network, or remote-peer data path into `populate_cache_leaves()`.\nAC:L - On an affected platform the overflow is fully deterministic — whenever firmware (DT `cache-unified`/single `cache-size`, or ACPI PPTT `split_levels`) under-counts leaves relative to a `CLIDR_EL1` level reporting `CACHE_TYPE_SEPARATE`, the level-vs-leaf counter mismatch fires on every execution of the loop. There is no race, no timing window, and no memory-layout condition to win.\nPR:L - The vulnerable loop executes with no `capable()` check, no LSM gate, and no authentication anywhere on the path — it runs as part of normal CPU bring-up on behalf of the system, so no elevated credentials are required for the out-of-bounds write to occur; scoring at low local privilege rather than high since nothing on the path demands real root.\nUI:N - No victim action of any kind is needed — the out-of-bounds write happens autonomously during secondary-CPU initialization as part of ordinary system startup.\nS:U - The corruption is confined to the kernel's own slab allocations on the same host; no VM/hypervisor, IOMMU/DMA, or sandbox authority boundary is crossed.\nC:H - The heap out-of-bounds write clobbers `type` and `level` fields at fixed strides across up to several hundred bytes of adjacent slab objects allocated during early boot; corrupting neighbouring structures' length, index, or pointer fields is a classic route to kernel memory disclosure, so per memory-corruption guidance this is High.\nI:H - This is a direct out-of-bounds write past a `kcalloc()`'d `struct cacheinfo` array, silently modifying kernel heap memory belonging to unrelated objects — out-of-bounds writes are scored High for integrity because slab corruption is the standard primitive for control-flow hijack.\nA:H - Overwriting adjacent early-boot slab objects can corrupt pointers or allocator metadata, producing an oops, panic, or unbootable system; because it occurs during CPU bring-up on affected platforms, the result is complete loss of availability of the machine."
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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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"arch/arm64/kernel/cacheinfo.c"
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],
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"versions": [
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{
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"version": "5d425c18653731af62831d30a4fa023d532657a9",
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"lessThan": "4371ac7b494e933fffee2bd6265d18d73c4f05aa",
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"status": "affected",
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},
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"lessThan": "e4fde33107351ec33f1a64188612fbc6ca659284",
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"status": "affected",
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"status": "affected",
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"lessThan": "ab90894f33c15b14c1cee6959ab6c8dcb09127f8",
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"status": "affected",
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"version": "5d425c18653731af62831d30a4fa023d532657a9",
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"lessThan": "715eb1af64779e1b1aa0a7b2ffb81414d9f708e5",
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"status": "affected",
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"versionType": "git"
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{
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"version": "5d425c18653731af62831d30a4fa023d532657a9",
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"status": "affected",
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{
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"lessThan": "875d742cf5327c93cba1f11e12b08d3cce7a88d2",
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"status": "affected",
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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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"arch/arm64/kernel/cacheinfo.c"
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],
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"versions": [
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{
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"version": "4.0",
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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": "4.0",
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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": "5.4.291",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.235",
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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": "5.15.179",
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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": "6.1.129",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.79",
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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": "6.12.16",
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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": "6.13.4",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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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"url": "https://git.kernel.org/stable/c/875d742cf5327c93cba1f11e12b08d3cce7a88d2"
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}
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],
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"title": "arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array",
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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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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
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"dateUpdated": "2025-11-03T20:59:30.431Z"
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{
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"metrics": [
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{
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-21785",
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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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"Technical Impact": "total"
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:42:54.678406Z"
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}
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],
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"title": "CISA ADP Vulnrichment",
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} |