247 lines
13 KiB
JSON
247 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-2026-63879",
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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": "2026-07-19T07:54:57.018Z",
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"datePublished": "2026-07-19T14:54:51.698Z",
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"dateUpdated": "2026-10-21T12:42:43.701Z"
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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": "2026-10-21T12:42:43.701Z"
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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 amdgpu_hmm_range_get_pages\n\nThe notifier sequence must only be read once or otherwise we could work\nwith invalid pages.\n\nWhile at it also fix the coding style, e.g. drop the pre-initialized\nreturn value and use the common define for 2G range.\n\n(cherry picked from commit c08972f555945cda57b0adb72272a37910153390)"
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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 bug is reached only through local AMDGPU DRM ioctls (e.g., AMDGPU_GEM_USERPTR, AMDGPU_CS) and KFD ioctls on /dev/kfd that call amdgpu_hmm_range_get_pages(); there is no network-facing entry point.\nAC:L - Exploitation requires a >2GB userptr/SVM mapping and a concurrent munmap/remap during the multi-chunk HMM walk, but the attacker controls both the ioctl thread and the address-space manipulation, so the race is attacker-driven rather than dependent on uncontrollable conditions.\nPR:L - Any unprivileged local user with access to the AMDGPU render node or /dev/kfd (typically render/video group membership) can create large userptr buffers and submit GPU work that triggers the vulnerable HMM path; root or init-namespace capabilities are not required.\nUI:N - Exploitation is fully attacker-driven through GPU memory registration and command submission ioctls and does not require any action from another user or administrator.\nS:U - The flaw corrupts or misuses kernel-tracked page metadata and enables standard local kernel memory safety impact and privilege escalation within the same kernel security domain, not a VM escape or IOMMU boundary bypass.\nC:H - Re-reading the MMU notifier sequence per 2GB chunk lets later validation pass while earlier PFNs may reference unmapped or freed pages, giving the GPU (and kernel DMA helpers) a stale-page/use-after-free primitive that can disclose arbitrary physical memory contents.\nI:H - Stale PFNs from invalidated mappings can be DMA-mapped and written by GPU operations, enabling arbitrary memory corruption and potential control-flow hijacking via repurposed physical pages rather than a bounded or crash-only effect.\nA:H - Operating on invalid struct page pointers during pinning/DMA mapping can trigger kernel oopses or panics, and the underlying use-after-free class of bug inherently threatens system availability even when full exploitation is not attempted."
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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_hmm.c"
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],
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"versions": [
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{
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"version": "c1420a5dd4dd2a1ffc86965ad1c6f439afb130bc",
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"lessThan": "e35cf322897dd4921248d11311a89c865b534c14",
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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": "c1420a5dd4dd2a1ffc86965ad1c6f439afb130bc",
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"lessThan": "93a9f121de6383f20290840d025ee28fda5f53b5",
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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": "c1420a5dd4dd2a1ffc86965ad1c6f439afb130bc",
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"lessThan": "fa34d3e14cb763b50702e8a0f7d4cfd877a73ab9",
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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": "c1420a5dd4dd2a1ffc86965ad1c6f439afb130bc",
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"lessThan": "2fd24407457a6b181ba827705678da70e528dcd0",
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"status": "affected",
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{
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"lessThan": "962d684b5dc0741dcd93485d41b450de402d5592",
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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/gpu/drm/amd/amdgpu/amdgpu_hmm.c"
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],
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"versions": [
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{
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"version": "6.2",
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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": "6.2",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.114",
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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": "6.18.57",
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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": "7.0.12",
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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": "6.2",
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"versionEndExcluding": "6.6.160"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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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]
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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/e35cf322897dd4921248d11311a89c865b534c14"
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},
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{
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"url": "https://git.kernel.org/stable/c/93a9f121de6383f20290840d025ee28fda5f53b5"
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},
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{
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"url": "https://git.kernel.org/stable/c/fa34d3e14cb763b50702e8a0f7d4cfd877a73ab9"
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},
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{
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"url": "https://git.kernel.org/stable/c/2fd24407457a6b181ba827705678da70e528dcd0"
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},
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{
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"url": "https://git.kernel.org/stable/c/962d684b5dc0741dcd93485d41b450de402d5592"
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}
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],
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"title": "drm/amdgpu: fix amdgpu_hmm_range_get_pages",
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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-2026-63879",
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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": "2026-10-16T15:32:44.866799Z"
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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": "2026-10-19T20:17:53.865Z"
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}
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}
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]
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}
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} |