247 lines
17 KiB
JSON
247 lines
17 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-2023-53659",
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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": "2025-10-07T15:16:59.662Z",
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"datePublished": "2025-10-07T15:21:19.619Z",
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"dateUpdated": "2026-10-15T21:41:32.791Z"
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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": "2026-08-05T09:15:23.282Z"
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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\niavf: Fix out-of-bounds when setting channels on remove\n\nIf we set channels greater during iavf_remove(), and waiting reset done\nwould be timeout, then returned with error but changed num_active_queues\ndirectly, that will lead to OOB like the following logs. Because the\nnum_active_queues is greater than tx/rx_rings[] allocated actually.\n\nReproducer:\n\n [root@host ~]# cat repro.sh\n #!/bin/bash\n\n pf_dbsf=\"0000:41:00.0\"\n vf0_dbsf=\"0000:41:02.0\"\n g_pids=()\n\n function do_set_numvf()\n {\n echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n sleep $((RANDOM%3+1))\n echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n sleep $((RANDOM%3+1))\n }\n\n function do_set_channel()\n {\n local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)\n [ -z \"$nic\" ] && { sleep $((RANDOM%3)) ; return 1; }\n ifconfig $nic 192.168.18.5 netmask 255.255.255.0\n ifconfig $nic up\n ethtool -L $nic combined 1\n ethtool -L $nic combined 4\n sleep $((RANDOM%3))\n }\n\n function on_exit()\n {\n local pid\n for pid in \"${g_pids[@]}\"; do\n kill -0 \"$pid\" &>/dev/null && kill \"$pid\" &>/dev/null\n done\n g_pids=()\n }\n\n trap \"on_exit; exit\" EXIT\n\n while :; do do_set_numvf ; done &\n g_pids+=($!)\n while :; do do_set_channel ; done &\n g_pids+=($!)\n\n wait\n\nResult:\n\n[ 3506.152887] iavf 0000:41:02.0: Removing device\n[ 3510.400799] ==================================================================\n[ 3510.400820] BUG: KASAN: slab-out-of-bounds in iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400823] Read of size 8 at addr ffff88b6f9311008 by task repro.sh/55536\n[ 3510.400823]\n[ 3510.400830] CPU: 101 PID: 55536 Comm: repro.sh Kdump: loaded Tainted: G O --------- -t - 4.18.0 #1\n[ 3510.400832] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021\n[ 3510.400835] Call Trace:\n[ 3510.400851] dump_stack+0x71/0xab\n[ 3510.400860] print_address_description+0x6b/0x290\n[ 3510.400865] ? iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400868] kasan_report+0x14a/0x2b0\n[ 3510.400873] iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400880] iavf_remove+0x2b6/0xc70 [iavf]\n[ 3510.400884] ? iavf_free_all_rx_resources+0x160/0x160 [iavf]\n[ 3510.400891] ? wait_woken+0x1d0/0x1d0\n[ 3510.400895] ? notifier_call_chain+0xc1/0x130\n[ 3510.400903] pci_device_remove+0xa8/0x1f0\n[ 3510.400910] device_release_driver_internal+0x1c6/0x460\n[ 3510.400916] pci_stop_bus_device+0x101/0x150\n[ 3510.400919] pci_stop_and_remove_bus_device+0xe/0x20\n[ 3510.400924] pci_iov_remove_virtfn+0x187/0x420\n[ 3510.400927] ? pci_iov_add_virtfn+0xe10/0xe10\n[ 3510.400929] ? pci_get_subsys+0x90/0x90\n[ 3510.400932] sriov_disable+0xed/0x3e0\n[ 3510.400936] ? bus_find_device+0x12d/0x1a0\n[ 3510.400953] i40e_free_vfs+0x754/0x1210 [i40e]\n[ 3510.400966] ? i40e_reset_all_vfs+0x880/0x880 [i40e]\n[ 3510.400968] ? pci_get_device+0x7c/0x90\n[ 3510.400970] ? pci_get_subsys+0x90/0x90\n[ 3510.400982] ? pci_vfs_assigned.part.7+0x144/0x210\n[ 3510.400987] ? __mutex_lock_slowpath+0x10/0x10\n[ 3510.400996] i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]\n[ 3510.401001] sriov_numvfs_store+0x214/0x290\n[ 3510.401005] ? sriov_totalvfs_show+0x30/0x30\n[ 3510.401007] ? __mutex_lock_slowpath+0x10/0x10\n[ 3510.401011] ? __check_object_size+0x15a/0x350\n[ 3510.401018] kernfs_fop_write+0x280/0x3f0\n[ 3510.401022] vfs_write+0x145/0x440\n[ 3510.401025] ksys_write+0xab/0x160\n[ 3510.401028] ? __ia32_sys_read+0xb0/0xb0\n[ 3510.401031] ? fput_many+0x1a/0x120\n[ 3510.401032] ? filp_close+0xf0/0x130\n[ 3510.401038] do_syscall_64+0xa0/0x370\n[ 3510.401041] ? page_fault+0x8/0x30\n[ 3510.401043] entry_SYSCALL_64_after_hwframe+0x65/0xca\n[ 3510.401073] RIP: 0033:0x7f3a9bb842c0\n[ 3510.401079] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d \n---truncated---"
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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 function is reached only through the ethtool interface — `SIOCETHTOOL`/`ETHTOOL_SCHANNELS` ioctl or the `ETHTOOL_MSG_CHANNELS_SET` genetlink message — both of which require a local process on the machine running the iavf driver. No remote or adjacent-network packet path reaches `iavf_set_channels()`.\nAC:L - The attacker fully drives the triggering side and can spam `ethtool -L <if> combined 1/16` in a tight loop indefinitely at no cost; the required 20-second reset stall recurs routinely in the SR-IOV lifecycle (VF hot-plug/unplug, `sriov_numvfs` changes, PF driver reset, FLR, PF saturated by many simultaneous VF resets), so the OOB fires reliably rather than requiring a one-shot narrow window. Once `iavf_reset_task` enters its own 20 s \"reset never finished\" wait, any concurrently-waiting `ethtool -L` is guaranteed to time out and corrupt the counter.\nPR:L - Setting channels is gated on `ns_capable(net->user_ns, CAP_NET_ADMIN)` / `GENL_UNS_ADMIN_PERM`, i.e. CAP_NET_ADMIN relative to the owning user namespace, which an unprivileged user holds inside a user+network namespace — the standard SR-IOV-to-container deployment (SR-IOV CNI / DPDK / telco pods) moves the VF netdev into exactly such a namespace. Additionally, harvesting the resulting out-of-bounds data via `ethtool -S` (`ETHTOOL_GSTATS`) requires no privileges at all.\nUI:N - The attacker performs the entire sequence themselves with ethtool calls; no victim action, file open, or mount is needed. The concurrent reset stall is a device/PF lifecycle event, not a user interaction.\nS:U - The out-of-bounds accesses corrupt kernel slab memory belonging to the same kernel that the attacker is already interacting with; no VM, IOMMU, or sandbox boundary is crossed. Standard local kernel memory-corruption scope.\nC:H - With the counter inflated, `iavf_get_ethtool_stats()` reads `tx_rings[i]`/`rx_rings[i]` far past the kcalloc'd array and copies those adjacent kernel-heap u64s directly into a userspace buffer via `ethtool -S`, which needs no privileges — a clean, repeatable multi-kilobyte heap disclosure including kernel pointers.\nI:H - `iavf_configure_tx()`/`iavf_configure_rx()` write `tail`, `rx_buf_len` and `flags` past the end of the array, and `iavf_free_tx_resources()` calls `kfree()`, `memset(desc, 0, size)` and `dma_free_coherent()` on pointers/sizes read out of bounds — an arbitrary-free and arbitrary-zeroing primitive over groomable heap that is exploitable for control-flow hijack.\nA:H - The commit's own reproducer produces a KASAN slab-out-of-bounds oops in `iavf_free_all_tx_resources()` during `iavf_remove()`; the racing `iavf_disable_vf()` path additionally leaves `tx_rings`/`rx_rings` NULL with a non-zero counter, giving a NULL+offset dereference. Either way the result is a kernel panic, plus a 20-second rtnl_lock hold that stalls the whole networking stack."
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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/net/ethernet/intel/iavf/iavf_ethtool.c"
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],
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{
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"status": "affected",
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{
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"version": "5.15.5",
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"lessThan": "5.15.123",
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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/net/ethernet/intel/iavf/iavf_ethtool.c"
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],
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"version": "5.10.188",
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"lessThanOrEqual": "5.10.*",
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},
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{
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"version": "6.1.42",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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{
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"version": "6.4.7",
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"lessThanOrEqual": "6.4.*",
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"status": "unaffected",
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},
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{
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"version": "6.5",
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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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"nodes": [
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"operator": "OR",
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"references": [
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"url": "https://git.kernel.org/stable/c/b92defe4e8ee86996c16417ad8c804cb4395fddd"
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},
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"url": "https://git.kernel.org/stable/c/0fb37ce6c01e17839e26d03222f0b44e6a3ed2b9"
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},
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{
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},
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"url": "https://git.kernel.org/stable/c/65ecebc9ac09427b2c65f271cd5e5bd536c3fe38"
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"url": "https://git.kernel.org/stable/c/7c4bced3caa749ce468b0c5de711c98476b23a52"
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}
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],
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"title": "iavf: Fix out-of-bounds when setting channels on remove",
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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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"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-2023-53659",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:36:16.388516Z"
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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": "2026-10-15T21:41:32.791Z"
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}
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}
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]
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}
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} |