194 lines
10 KiB
JSON
194 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-2024-41026",
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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": "2024-07-12T12:17:45.616Z",
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"datePublished": "2024-07-29T14:31:43.056Z",
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"dateUpdated": "2026-08-05T11:34:48.544Z"
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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": "2026-08-05T11:34:48.544Z"
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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\nmmc: davinci_mmc: Prevent transmitted data size from exceeding sgm's length\n\nNo check is done on the size of the data to be transmiited. This causes\na kernel panic when this size exceeds the sg_miter's length.\n\nLimit the number of transmitted bytes to sgm->length."
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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 PIO path is reached through local device I/O — `MMC_IOC_CMD`/`MMC_IOC_MULTI_CMD` on the mmcblk block device or the RPMB character device — with no network or physical component required. No remote or adjacent-network protocol touches this driver.\nAC:L - The attacker deterministically selects `blksz`/`blocks` so that `blocks*blksz` is not a multiple of `rw_threshold`, which forces the PIO fallback in `mmc_davinci_prepare_data()` and makes the unclamped 32-byte priming transfer overrun a smaller scatterlist chunk on the first attempt. There is no race, no memory-layout guess, and no condition outside the attacker's control.\nPR:L - `mmc_rpmb_ioctl()` dispatches `MMC_IOC_CMD` into `mmc_blk_ioctl_cmd()` without any `capable()` check, so any user holding an open descriptor to `/dev/mmcblk*rpmb` — routinely group-accessible on embedded and Android-class deployments of this SoC family — can drive arbitrary `blksz`/`blocks` transfers. No administrative capability is needed on that path.\nUI:N - The attacker issues the ioctl directly against an already-present card; no victim action, card insertion, or mount is required.\nS:U - The out-of-bounds access corrupts and discloses kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - In the write direction the driver reads far past the end of the kmalloc'd/kmapped buffer and streams that kernel memory into the MMC data register, and the underflowed `bytes_left`/`__remaining` turn this into an effectively unbounded sequential read of kernel memory (data landing inside the programmed transfer window is persisted to attacker-controlled card storage and read back). This is not a bounded few-byte leak.\nI:H - The same missing clamp in the read direction writes card-supplied bytes past the destination chunk, and once `sg_miter`'s `__remaining`/`__offset` and `host->bytes_left` underflow the driver writes attacker-influenced data far beyond the mapped page — an out-of-bounds heap write suitable for corrupting adjacent slab objects.\nA:H - The commit message states outright that exceeding the sg_miter length causes a kernel panic; the underflowed `host->bytes_left` also drives a multi-gigabyte copy loop in hard IRQ context that faults off the end of the mapping, giving a reliable oops/lockup."
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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/mmc/host/davinci_mmc.c"
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],
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"versions": [
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{
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"version": "ed01d210fd910f7fa7933638df14ffb8d4aac2a9",
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"lessThan": "c561c4ecce712f94b442db5960e281f13b28df2e",
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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": "ed01d210fd910f7fa7933638df14ffb8d4aac2a9",
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"lessThan": "16198eef11c1929374381d7f6271b4bf6aa44615",
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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/mmc/host/davinci_mmc.c"
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],
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"versions": [
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{
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"version": "6.9",
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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": "6.9",
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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": "6.9.10",
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"lessThanOrEqual": "6.9.*",
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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": "6.10",
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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": "6.9",
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"versionEndExcluding": "6.9.10"
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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": "6.9",
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"versionEndExcluding": "6.10"
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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/c561c4ecce712f94b442db5960e281f13b28df2e"
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},
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{
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"url": "https://git.kernel.org/stable/c/16198eef11c1929374381d7f6271b4bf6aa44615"
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}
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],
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"title": "mmc: davinci_mmc: Prevent transmitted data size from exceeding sgm's length",
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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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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-02T04:39:56.171Z"
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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://git.kernel.org/stable/c/c561c4ecce712f94b442db5960e281f13b28df2e",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/16198eef11c1929374381d7f6271b4bf6aa44615",
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"tags": [
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{
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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-2024-41026",
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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": "2024-09-10T16:24:09.083090Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-11T17:34:04.488Z"
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}
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} |