258 lines
13 KiB
JSON
258 lines
13 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-2026-68245",
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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": "2026-07-30T09:28:09.377Z",
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"datePublished": "2026-08-10T12:01:11.501Z",
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"dateUpdated": "2026-10-30T12:28:14.789Z"
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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": "2026-10-30T12:28:14.789Z"
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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\ndrm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()\n\nThe vm pointer returned from amdgpu_vm_get_vm_from_pasid() is only\nvalid while the lock is still being held. Once xa_unlock_irqrestore is\ncalled and returned, the pointer is no longer under lock and is subject\nto modification. Since, the caller still dereferences vm->task_info in\namdgpu_vm_get_task_info_vm() after the lock is removed, this causes a\nuse after unlock problem.\n\nRemove the lifetime issue present in amdgpu_vm_get_task_info_pasid()\nthrough removing the amdgpu_vm_get_vm_from_pasid() function from\namdgpu_vm.c and making the relevant code inline to hold the lock while\nit is still in use.\n\n(cherry picked from commit 9d01579f3f868b333acc901815972685989092c7)"
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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 code is reached through the amdgpu DRM device (render node) via command submission causing a GPU VM page fault or a ring timeout; this requires local access to /dev/dri/renderD*, with no network exposure.\nAC:L - The attacker controls both sides of the race: it can generate GPU page faults or job timeouts at will while concurrently closing DRM file descriptors to free the amdgpu_vm/fpriv, and can retry the race arbitrarily many times until it wins.\nPR:L - Only an unprivileged local account with access to the AMD GPU render node is needed; render nodes are world/group accessible by default on desktop, Android and container workloads, and no capability is checked on the CS/fault path.\nUI:N - The attacker's own processes generate the GPU faults and the concurrent VM teardown; no action by any other user is required.\nS:U - The corruption stays within the kernel's own security authority — the freed amdgpu_vm/amdgpu_task_info are kernel heap objects, with no crossing of a VM or IOMMU boundary.\nC:H - The stale vm pointer is dereferenced after free, reading vm->task_info out of reallocated kernel heap memory, and the resulting task_info contents (process name, pid, tgid) are then printed/exported, allowing disclosure of attacker-groomed or unrelated kernel data.\nI:H - kref_get() is performed on memory that may already be freed and reallocated, writing an increment into another object's fields, and the paired kref_put() can drop a foreign refcount to zero — a classic use-after-free/refcount-corruption primitive leveraged for arbitrary write and privilege escalation.\nA:H - The use-after-free occurs in a GPU interrupt handler and the reset/timeout path; dereferencing freed memory or corrupting a reused slab object readily oopses or panics the kernel, and it can be retriggered repeatedly."
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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/gpu/drm/amd/amdgpu/amdgpu_vm.c"
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],
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"versions": [
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{
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"version": "b8f67b9ddf4f8fe6dd536590712b5912ad78f99c",
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"lessThan": "fe16a7e5336ae888751984e30c451fbf7cfa5df7",
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"status": "affected",
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"status": "affected",
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{
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"lessThan": "5d5fb9124a2bba96a7807086d8fe0f7ce810d546",
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"status": "affected",
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"lessThan": "04cc4aa3617b0ed67e859f91f09de5d896a46f3a",
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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": "aa22d6c58505d239814b5ef8fa7da4ce43e9212b",
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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": "251840f22eff35c25de531a3fcb523df94c128c0",
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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": "6.1.191",
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"lessThan": "6.2",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThan": "6.7",
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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/gpu/drm/amd/amdgpu/amdgpu_vm.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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},
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{
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"version": "6.12.101",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.42",
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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": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"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": "6.12.101"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fe16a7e5336ae888751984e30c451fbf7cfa5df7"
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},
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{
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"url": "https://git.kernel.org/stable/c/1173190412fb9d12e7efce76734118d9712ff970"
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},
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{
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"url": "https://git.kernel.org/stable/c/5d5fb9124a2bba96a7807086d8fe0f7ce810d546"
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},
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{
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"url": "https://git.kernel.org/stable/c/04cc4aa3617b0ed67e859f91f09de5d896a46f3a"
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}
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],
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"title": "drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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-2026-68245",
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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": "2026-10-16T15:46:07.633489Z"
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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-362",
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"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
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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": "2026-10-19T20:58:57.944Z"
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}
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}
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]
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}
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} |