237 lines
12 KiB
JSON
237 lines
12 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-2024-35954",
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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": "2024-05-17T13:50:33.135Z",
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"datePublished": "2024-05-20T09:41:47.944Z",
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"dateUpdated": "2026-08-05T11:31:11.820Z"
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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": "2026-08-05T11:31:11.820Z"
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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\nscsi: sg: Avoid sg device teardown race\n\nsg_remove_sfp_usercontext() must not use sg_device_destroy() after calling\nscsi_device_put().\n\nsg_device_destroy() is accessing the parent scsi_device request_queue which\nwill already be set to NULL when the preceding call to scsi_device_put()\nremoved the last reference to the parent scsi_device.\n\nThe resulting NULL pointer exception will then crash the kernel."
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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 entered by opening and closing the `/dev/sgN` character device, i.e. local file/syscall access to the SCSI generic driver. There is no network-facing consumer of `sg_remove_sfp_usercontext()`.\nAC:L - The attacker holds one side of the race directly (it owns the open sg fd and chooses when to `close()`), and can supply the other side by hot-unplugging its own removable SCSI/USB storage or by looping open/close across a hot-unplug; once sg holds the last `scsi_device` reference the ordering bug fires deterministically, and the attempt is freely repeatable.\nPR:L - No capability check exists on this path — only DAC permission on `/dev/sgN`, which is granted to the unprivileged `disk` group on mainstream distros and is world-accessible on many embedded/appliance and storage-software deployments; the device-removal side (physical unplug, transport loss, hypervisor hot-unplug) needs no privilege either.\nUI:N - The attacker performs the `open()`, triggers the device teardown, and performs the final `close()` from its own process; no victim action is required.\nS:U - The use-after-free and the resulting corruption are confined to kernel memory within the same security authority, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - `sg_device_destroy()` dereferences the already-`kfree()`d `struct scsi_device`, and the reclaimed slab can be groomed so the stale `request_queue` pointer aims `blk_trace_remove()`/`blk_put_queue()` at attacker-chosen kernel memory, yielding a leverageable kernel-memory disclosure primitive.\nI:H - The stale pointer loaded from freed memory is used for writes — `mutex_lock(&q->debugfs_mutex)`, `rcu_replace_pointer(q->blk_trace, NULL)`, and `refcount_dec_and_test(&q->refs)` — so a reallocated slab gives a controlled write into kernel memory and a path to control-flow hijack.\nA:H - In the common case the stale value is NULL and `blk_trace_remove(NULL)`/`blk_put_queue(NULL)` immediately oops the kernel, as stated in the fix commit; the crash is repeatable and takes down the whole 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/scsi/sg.c"
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],
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"versions": [
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{
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"version": "db59133e927916d8a25ee1fd8264f2808040909d",
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"lessThan": "46af9047523e2517712ae8e71d984286c626e022",
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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": "db59133e927916d8a25ee1fd8264f2808040909d",
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"lessThan": "b0d1ebcc1a9560e494ea9b3ee808540db26c5086",
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"status": "affected",
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{
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"lessThan": "27f58c04a8f438078583041468ec60597841284d",
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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": "4cc664e59bf2553771e4c9e90f758f7434cfdc22",
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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": "6.4.7",
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"lessThan": "6.5",
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"status": "affected",
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"versionType": "semver"
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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/scsi/sg.c"
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],
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"versions": [
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{
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"version": "6.5",
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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": "6.5",
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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": "6.6.28",
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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": "6.8.7",
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"lessThanOrEqual": "6.8.*",
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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": "6.9",
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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": "6.5",
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"versionEndExcluding": "6.6.28"
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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": "6.5",
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"versionEndExcluding": "6.8.7"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.5",
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"versionEndExcluding": "6.9"
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"vulnerable": true,
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/46af9047523e2517712ae8e71d984286c626e022"
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},
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{
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"url": "https://git.kernel.org/stable/c/b0d1ebcc1a9560e494ea9b3ee808540db26c5086"
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"url": "https://git.kernel.org/stable/c/27f58c04a8f438078583041468ec60597841284d"
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}
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],
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"title": "scsi: sg: Avoid sg device teardown race",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"adp": [
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{
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"title": "CISA ADP Vulnrichment",
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-35954",
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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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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-05-20T17:01:34.449905Z"
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}
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"providerMetadata": {
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-06-04T17:34:37.893Z"
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}
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"dateUpdated": "2024-08-02T03:21:49.126Z"
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"title": "CVE Program Container",
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