205 lines
11 KiB
JSON
205 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-2026-53187",
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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": "2026-06-09T07:44:35.390Z",
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"datePublished": "2026-06-25T08:39:00.175Z",
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"dateUpdated": "2026-10-19T19:57:27.163Z"
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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": "2026-08-05T12:33:54.299Z"
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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\nRDMA/core: Validate cpu_id against nr_cpu_ids in DMAH alloc\n\nThe cpu_id attribute supplied by user space through\nUVERBS_ATTR_ALLOC_DMAH_CPU_ID is passed directly to cpumask_test_cpu()\nwithout first verifying that the value is within the valid CPU range.\n\nPassing such untrusted data to cpumask_test_cpu() may lead to an\nout-of-bounds read of the underlying cpumask bitmap: the helper expands\nto a test_bit() that indexes the bitmap by cpu_id / BITS_PER_LONG with\nno bound check.\n\nIn addition, on kernels built with CONFIG_DEBUG_PER_CPU_MAPS it trips\nthe WARN_ON_ONCE() in cpumask_check(); combined with panic_on_warn this\nturns a bad user input into a machine reboot.\n\nReject any cpu_id that is not smaller than nr_cpu_ids with -EINVAL\nbefore it is used.\n\nReported by Smatch."
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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:N/A:H",
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"baseScore": 7.1,
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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 reached by a local RDMA uverbs ioctl on /dev/infiniband/uverbsN, specifically RDMA_VERBS_IOCTL selecting UVERBS_METHOD_DMAH_ALLOC. It is not exposed by incoming network packets or remote RDMA traffic.\nAC:L - An attacker can supply an out-of-range UVERBS_ATTR_ALLOC_DMAH_CPU_ID directly in one ioctl, with no race or victim-controlled timing requirement. The only deployment prerequisite is an affected RDMA device exposing the DMAH uverbs method.\nPR:L - The uverbs ioctl path has no CAP_* check for DMAH allocation, and RDMA uverbs devices are designed to be usable by non-root users when the device node is accessible. This requires local low-privileged access rather than real administrator privileges.\nUI:N - No victim action is needed after the attacker has local access to the uverbs device. The attacker triggers the bug directly through the ioctl.\nS:U - The bug affects kernel RDMA/core processing within the same host kernel security authority. It does not cross a VM, IOMMU, or separate authorization boundary.\nC:H - The unchecked cpu_id is passed to cpumask_test_cpu(), which expands to test_bit() on current->cpus_ptr without a bounds check, creating an out-of-bounds kernel memory read. The result influences the returned error/path, making a kernel memory bit oracle defensible.\nI:N - The identified primitive is an out-of-bounds read of a cpumask bitmap and no kernel out-of-bounds write or control-flow corruption was found on the traced path. Passing the value onward only affects TPH steering-tag allocation if the read happens to pass.\nA:H - Large invalid cpu_id values can trigger CONFIG_DEBUG_PER_CPU_MAPS WARN_ON_ONCE(), and with panic_on_warn this reboots the machine. The same unchecked test_bit() can also fault from an out-of-bounds kernel read, making kernel oops/panic availability impact defensible."
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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/infiniband/core/uverbs_std_types_dmah.c"
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],
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"versions": [
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{
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"version": "d83edab562a496a42720902a1d2effccd05c37c5",
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"lessThan": "bd5e818be7964c1689fba2dad9e6bd3a827fee74",
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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": "d83edab562a496a42720902a1d2effccd05c37c5",
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"lessThan": "0efbb6b54ff56300867027d8e0800d0e32226a20",
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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": "d83edab562a496a42720902a1d2effccd05c37c5",
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"lessThan": "323c98a4ff06aa28114f2bf658fb43eb3b536bbc",
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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/infiniband/core/uverbs_std_types_dmah.c"
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],
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"versions": [
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{
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"version": "6.17",
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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": "6.17",
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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": "6.18.36",
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"lessThanOrEqual": "6.18.*",
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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": "7.0.13",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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": "6.17",
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"versionEndExcluding": "6.18.36"
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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": "6.17",
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"versionEndExcluding": "7.0.13"
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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": "6.17",
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"versionEndExcluding": "7.1"
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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/bd5e818be7964c1689fba2dad9e6bd3a827fee74"
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},
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{
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"url": "https://git.kernel.org/stable/c/0efbb6b54ff56300867027d8e0800d0e32226a20"
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},
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{
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"url": "https://git.kernel.org/stable/c/323c98a4ff06aa28114f2bf658fb43eb3b536bbc"
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}
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],
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"title": "RDMA/core: Validate cpu_id against nr_cpu_ids in DMAH alloc",
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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-2026-53187",
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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": "2026-10-16T15:26:25.299167Z"
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}
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}
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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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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T19:57:27.163Z"
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}
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}
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]
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}
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} |