248 lines
13 KiB
JSON
248 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-2026-68257",
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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": "2026-07-30T09:28:09.378Z",
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"datePublished": "2026-08-10T12:01:30.547Z",
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"dateUpdated": "2026-10-19T20:58:58.377Z"
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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": "2026-08-18T06:55:54.208Z"
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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/amdkfd: fix 32-bit overflow in CWSR total size calculation\n\ntotal_cwsr_size was computed in 32-bit before being used as a BO/SVM\nallocation size.\nWith large ctx_save_restore_area_size and debug_memory_size\nmultiplied by the XCC count, the product can wrap,\nyielding an undersized CWSR save area that firmware later overruns.\n\nPromote total_cwsr_size to u64 and use check_add_overflow()/\ncheck_mul_overflow() in both kfd_queue_acquire_buffers() and\nkfd_queue_release_buffers().\n\n(cherry picked from commit 319f7e13423ae3f486b9aea82f9ad2d6af0ee608)"
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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 - Triggered through the AMDKFD_IOC_CREATE_QUEUE ioctl on the local /dev/kfd character device; the attacker-controlled ctx_save_restore_size field comes straight from the ioctl argument struct with no remote reachability.\nAC:L - The overflow is pure deterministic arithmetic on a value the attacker fully controls — passing ctx_save_restore_size near 2^32 (or /NUM_XCC on multi-XCC MI300 parts) reliably wraps total_cwsr_size to 0 or a small value on every attempt, with no race or layout dependency.\nPR:L - Requires only an unprivileged local account with access to /dev/kfd, which is granted to the render group and is routinely available to ordinary users on ROCm hosts, GPU compute nodes, containers, Steam Deck/desktop and Chrome OS style systems; no capabilities are checked on this path.\nUI:N - The attacker creates the malicious compute queue entirely from its own process via a single ioctl; no action by any other user or administrator is needed.\nS:U - The undersized CWSR area and the resulting firmware overrun stay within the kernel/GPU driver security authority of the same machine; there is no hypervisor or IOMMU boundary crossed.\nC:H - With validation bypassed, CP firmware save/restore reads span memory adjacent to the tiny validated buffer and load it into wave state the attacker's shader can read back, and get_wave_state copies per-XCC control-stack contents out of the unvalidated region, giving a broad out-of-bounds disclosure primitive.\nI:H - The queue is programmed with the full unwrapped save size and per-XCC base offsets, so firmware performs large out-of-bounds writes of wave/control-stack data beyond the buffer that was actually validated and reference-counted, and the bypassed queue_refcount lets those buffers be unmapped or freed while the queue is live — an attacker-influenced memory-corruption primitive.\nA:H - Overrunning the CWSR save area drives the GPU into unmapped VA on preemption, causing VM faults, queue hangs and driver-initiated GPU resets that take down all GPU workloads on the machine, including other tenants on shared compute nodes."
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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/amdkfd/kfd_queue.c"
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],
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"versions": [
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{
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"version": "325aa07165394b8e866ffe9ec1d4c99d9195b2f2",
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"lessThan": "b88ffe6593607364a8c06a48c6f29e55437cdf8e",
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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": "d15deafab5d722afb9e2f83c5edcdef9d9d98bd1",
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"lessThan": "abce3276c57e36c955627307469b9f009057a467",
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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": "d15deafab5d722afb9e2f83c5edcdef9d9d98bd1",
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"lessThan": "865532d54eb57b660b1cb1b0e1755776ce21b849",
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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": "d15deafab5d722afb9e2f83c5edcdef9d9d98bd1",
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"lessThan": "2b0386d4293920e690c0e017708f999b93cc729b",
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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": "63600103d2ac5c09fdeec5b931b396e4e0efd5d8",
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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": "6.12.59",
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"lessThan": "6.12.101",
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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": "6.17.9",
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"lessThan": "6.18",
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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/amdkfd/kfd_queue.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "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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{
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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": "6.12.59",
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"versionEndExcluding": "6.12.101"
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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/b88ffe6593607364a8c06a48c6f29e55437cdf8e"
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},
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{
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"url": "https://git.kernel.org/stable/c/abce3276c57e36c955627307469b9f009057a467"
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},
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{
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"url": "https://git.kernel.org/stable/c/865532d54eb57b660b1cb1b0e1755776ce21b849"
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},
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{
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"url": "https://git.kernel.org/stable/c/2b0386d4293920e690c0e017708f999b93cc729b"
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}
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],
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"title": "drm/amdkfd: fix 32-bit overflow in CWSR total size calculation",
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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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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68257",
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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": "2026-10-16T15:46:15.764782Z"
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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-190",
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"description": "CWE-190 Integer Overflow or Wraparound"
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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": "2026-10-19T20:58:58.377Z"
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}
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}
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]
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}
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} |