201 lines
11 KiB
JSON
201 lines
11 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-2025-40095",
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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": "2025-04-16T07:20:57.163Z",
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"datePublished": "2025-10-30T09:48:03.276Z",
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"dateUpdated": "2026-08-05T12:07:46.524Z"
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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": "2026-08-05T12:07:46.524Z"
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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\nusb: gadget: f_rndis: Refactor bind path to use __free()\n\nAfter an bind/unbind cycle, the rndis->notify_req is left stale. If a\nsubsequent bind fails, the unified error label attempts to free this\nstale request, leading to a NULL pointer dereference when accessing\nep->ops->free_request.\n\nRefactor the error handling in the bind path to use the __free()\nautomatic cleanup mechanism."
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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 is the gadget bind/unbind sequence driven entirely by local writes to `/sys/kernel/config/usb_gadget/<g>/UDC` (or legacy gadget module load); no USB traffic from an attached host is involved, so this is a local syscall/filesystem-reachable bug rather than a physical-access one.\nAC:L - The attacker controls every step — the successful bind, the unbind that leaves `rndis->notify_req` dangling, and the forced failure of the next bind (e.g. exhausting `usb_interface_id()`/`usb_ep_autoconfig()` by reshaping a functionfs function between cycles), plus the heap spray that reclaims the freed `usb_request`.\nPR:L - Only local write access to the USB gadget configfs tree is needed, which on Android and embedded/industrial deployments is routinely delegated to non-root system/daemon accounts that drive USB function switching; no capability check exists in the bind path itself.\nUI:N - The attacker performs all configfs writes itself; no victim action, cable plug event, or interaction with any other user is required.\nS:U - The dangling-pointer free corrupts kernel heap state within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use of the freed `usb_request` reads `->buf` out of reclaimed slab memory the attacker can groom, and the resulting arbitrary-free/double-free primitives enable object overlap and kernel memory disclosure.\nI:H - `kfree()` of an attacker-controlled pointer read from the freed request, plus a double free through `ep->ops->free_request`, yields classic heap-corruption primitives that can be leveraged into arbitrary write and privilege escalation.\nA:H - The immediate observed effect is a kernel oops — NULL/garbage `ep->ops` dereference in `usb_ep_free_request()` or slab corruption from the double free — panicking the system."
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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/usb/gadget/function/f_rndis.c"
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],
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"versions": [
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{
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"version": "45fe3b8e5342cd1ce307099459c74011d8e01986",
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"lessThan": "ef81226bb1f8b6e761cd0b53d2696e9c1bc955d1",
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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": "45fe3b8e5342cd1ce307099459c74011d8e01986",
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"lessThan": "5f65c8ad8c7292ed7e3716343fcd590a51818cc3",
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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": "45fe3b8e5342cd1ce307099459c74011d8e01986",
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"lessThan": "380353c3a92be7d928e6f973bd065c5b79755ac3",
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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": "45fe3b8e5342cd1ce307099459c74011d8e01986",
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"lessThan": "a8366263b7e5b663d7fb489d3a9ba1e2600049a6",
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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": "45fe3b8e5342cd1ce307099459c74011d8e01986",
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"lessThan": "08228941436047bdcd35a612c1aec0912a29d8cd",
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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/usb/gadget/function/f_rndis.c"
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],
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"versions": [
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{
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"version": "2.6.27",
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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": "2.6.27",
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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": "6.1.158",
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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": "6.6.114",
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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": "6.12.55",
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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": "6.17.5",
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"lessThanOrEqual": "6.17.*",
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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",
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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": "2.6.27",
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"versionEndExcluding": "6.1.158"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.12.55"
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"versionEndExcluding": "6.17.5"
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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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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ef81226bb1f8b6e761cd0b53d2696e9c1bc955d1"
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},
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{
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"url": "https://git.kernel.org/stable/c/5f65c8ad8c7292ed7e3716343fcd590a51818cc3"
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},
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{
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"url": "https://git.kernel.org/stable/c/380353c3a92be7d928e6f973bd065c5b79755ac3"
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},
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{
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"url": "https://git.kernel.org/stable/c/a8366263b7e5b663d7fb489d3a9ba1e2600049a6"
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},
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{
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"url": "https://git.kernel.org/stable/c/08228941436047bdcd35a612c1aec0912a29d8cd"
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}
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],
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"title": "usb: gadget: f_rndis: Refactor bind path to use __free()",
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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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} |