221 lines
11 KiB
JSON
221 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-2023-53254",
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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": "2025-09-15T14:19:21.849Z",
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"datePublished": "2025-09-15T14:46:24.670Z",
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"dateUpdated": "2026-08-05T09:13:18.284Z"
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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": "2026-08-05T09:13:18.284Z"
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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\ncacheinfo: Fix shared_cpu_map to handle shared caches at different levels\n\nThe cacheinfo sets up the shared_cpu_map by checking whether the caches\nwith the same index are shared between CPUs. However, this will trigger\nslab-out-of-bounds access if the CPUs do not have the same cache hierarchy.\nAnother problem is the mismatched shared_cpu_map when the shared cache does\nnot have the same index between CPUs.\n\nCPU0\tI\tD\tL3\nindex\t0\t1\t2\tx\n\t^\t^\t^\t^\nindex\t0\t1\t2\t3\nCPU1\tI\tD\tL2\tL3\n\nThis patch checks each cache is shared with all caches on other CPUs."
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}
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],
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"metrics": [
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{
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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 OOB occurs in cache_shared_cpu_map_setup/remove during local CPU bring-up (cacheinfo_cpu_online, update_siblings_masks/store_cpu_topology, and CPU offline cleanup), not via network packet processing or adjacent-link protocols.\nAC:L - On systems with asymmetric per-CPU cache hierarchies (the SiFive/heterogeneous topology described in the fix), indexing a sibling's smaller info_list with the current CPU's leaf index deterministically causes the slab OOB whenever that CPU comes online; no race or attacker-uncontrollable timing is required.\nPR:L - The OOB runs automatically during normal boot SMP bring-up and kernel-driven CPU hotplug on affected hardware, so a local unprivileged user can be present to leverage the resulting slab corruption without needing to write /sys/devices/system/cpu/*/online as real root.\nUI:N - CPU online/offline and early topology setup invoke the vulnerable path as part of normal kernel operation; no separate victim action such as mounting a filesystem or opening a device is required.\nS:U - The slab out-of-bounds access corrupts kernel heap within the host kernel's security authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - per_cpu_cacheinfo_idx() performs an unbounded slab out-of-bounds read of a full struct cacheinfo from adjacent heap when cache_leaves differ, which per guidance is Confidentiality High rather than a small bounded leak.\nI:H - If cache_leaves_are_shared() accepts the OOB leaf (or on remove after a sibling was recorded), cpumask_set_cpu/cpumask_clear_cpu writes into sib_leaf->shared_cpu_map past the allocated info_list, yielding a heap out-of-bounds write exploitable for integrity compromise.\nA:H - The slab out-of-bounds access can oops/panic the kernel when it hits unmapped or poisoned memory adjacent to the undersized info_list allocation, which is Availability High."
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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/base/cacheinfo.c"
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],
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"versions": [
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{
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"version": "246246cbde5e840012f853e27630ebb59f409486",
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"lessThan": "2f588d0345d69a35e451077afed428fd057a5e34",
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"status": "affected",
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"versionType": "git"
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"status": "affected",
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"lessThan": "198102c9103fc78d8478495971947af77edb05c1",
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"status": "affected",
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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/base/cacheinfo.c"
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],
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"versions": [
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{
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"version": "3.19",
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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": "3.19",
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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": "6.1.18",
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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": "6.2.5",
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"lessThanOrEqual": "6.2.*",
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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": "6.3",
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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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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.19",
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"versionEndExcluding": "6.1.18"
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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": "3.19",
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"versionEndExcluding": "6.2.5"
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},
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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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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2f588d0345d69a35e451077afed428fd057a5e34"
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},
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{
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"url": "https://git.kernel.org/stable/c/dea49f2993f57d8a2df2cacb0bf649ef49b28879"
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},
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{
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"url": "https://git.kernel.org/stable/c/198102c9103fc78d8478495971947af77edb05c1"
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}
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],
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"title": "cacheinfo: Fix shared_cpu_map to handle shared caches at different levels",
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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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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.1,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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-2023-53254",
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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": "2026-01-14T18:01:14.729698Z"
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-125",
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"description": "CWE-125 Out-of-bounds Read"
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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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"shortName": "CISA-ADP",
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"dateUpdated": "2026-01-14T18:02:52.518Z"
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