310 lines
16 KiB
JSON
310 lines
16 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-2026-72067",
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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": "2026-08-09T03:40:39.903Z",
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"datePublished": "2026-08-15T05:52:20.268Z",
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"dateUpdated": "2026-10-19T21:19:26.303Z"
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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": "2026-08-17T05:39:59.754Z"
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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\ncpu: hotplug: Preserve per instance callback errors\n\ncpuhp_invoke_callback() unwinds earlier callbacks for the same\nhotplug state when one instance fails. The rollback path currently\nreuses ret, so a successful rollback can hide the original error and\nmake the failed transition look successful.\n\nKeep the rollback result separate from the original error."
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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 in cpuhp_invoke_callback() during CPU hotplug state transitions, reached only via local kernel paths such as sysfs /sys/devices/system/cpu/cpuN/online, device_online/offline, and cpu_up()/cpu_down() from privileged local callers.\nAC:L - An attacker can reliably trigger the bug by inducing multi-instance callback failure (e.g., -ENOMEM via memory pressure) during CPU online/offline on cloud autoscaled nodes or servers running RAID/padata where rollback callbacks succeed and overwrite the original error.\nPR:L - CPU hotplug is normally admin-initiated, but an unprivileged local user can force multi-instance callback failures through memory exhaustion during system/hypervisor CPU hotplug without needing CAP_SYS_ADMIN or user-namespace admin capabilities.\nUI:N - Exploitation requires no victim interaction beyond normal system operation; it is triggered during kernel CPU hotplug transitions without the user opening files, mounting filesystems, or performing other deliberate actions.\nS:U - The vulnerability corrupts kernel CPU hotplug state-machine consistency and affects kernel subsystems on the same host; it does not cross a VM, container, or IOMMU security boundary to impact a separate authority.\nC:H - Silently completing hotplug after a failed multi-instance rollback leaves subsystems like padata and RAID5 in a state inconsistent with the hotplug machine, which can desynchronize RCU-protected structures and enable kernel memory disclosure primitives.\nI:H - When rollback overwrites the original error with success, cpuhp_up_callbacks()/cpuhp_down_callbacks() proceed and mark the CPU transition complete while multi-instance subsystem callbacks were only partially applied, corrupting kernel integrity and enabling further memory corruption.\nA:H - Proceeding past a failed multi-instance hotplug step while subsystems such as padata, RAID5, or virtio-net instances are left in an inconsistent partially-rolled-back state can cause kernel oops, panic, or hang on production cloud and server systems."
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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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"kernel/cpu.c"
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],
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"versions": [
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{
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"version": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "fe9c8d641f6991614d1229a3ffd3e33b879bba9c",
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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": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "ef39758637cc5b603fb05b625c45a98aa306e338",
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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": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "95232281512b15338549171ed9a2acf21f946ffb",
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"status": "affected",
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{
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"version": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "7a68257b90d8a9b6d605abc99469ded45ecba63b",
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"status": "affected",
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},
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{
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"version": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "77d4fa8a3ea1c3e8b996ac35e59aee9e77389905",
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"status": "affected",
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},
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{
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"version": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "f77117530fc3f5932ffb107182a6dd34006be9b6",
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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": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "9f7dc355f62c011e4afe8286cf71130d4bfb9d80",
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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": "724a86881d03ee5794148e65142e24ed3621be66",
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"lessThan": "673db10729fb121ea1b16fe57791a0cb9eac1eb5",
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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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"kernel/cpu.c"
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],
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"versions": [
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{
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"version": "4.14",
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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": "4.14",
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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": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.212",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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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": "7.1.5",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.14",
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"versionEndExcluding": "5.10.261"
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"references": [
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"url": "https://git.kernel.org/stable/c/fe9c8d641f6991614d1229a3ffd3e33b879bba9c"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef39758637cc5b603fb05b625c45a98aa306e338"
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"url": "https://git.kernel.org/stable/c/95232281512b15338549171ed9a2acf21f946ffb"
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{
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"url": "https://git.kernel.org/stable/c/7a68257b90d8a9b6d605abc99469ded45ecba63b"
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{
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"url": "https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b996ac35e59aee9e77389905"
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},
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{
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"url": "https://git.kernel.org/stable/c/f77117530fc3f5932ffb107182a6dd34006be9b6"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f7dc355f62c011e4afe8286cf71130d4bfb9d80"
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},
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{
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"url": "https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5"
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}
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],
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"title": "cpu: hotplug: Preserve per instance callback errors",
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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-2026-72067",
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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": "2026-10-16T15:51:18.639735Z"
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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-754",
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"description": "CWE-754 Improper Check for Unusual or Exceptional Conditions"
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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": "2026-10-19T21:19:26.303Z"
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}
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}
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]
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}
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} |