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-2026-72066",
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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": "2026-08-15T05:52:19.527Z",
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"dateUpdated": "2026-10-19T21:19:26.150Z"
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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": "2026-08-19T16:35:55.630Z"
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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: Bound hotplug states sysfs output\n\nstates_show() adds CPU hotplug state names into a single sysfs buffer\nusing sprintf(). With enough registered states, this can write past the\nend of the PAGE_SIZE buffer.\n\nUse sysfs_emit_at() so output is bounded."
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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 states_show() on the read path for /sys/devices/system/cpu/hotplug/states, reached only via a local sysfs/VFS read() syscall. No network packet handler, adjacent protocol, or physical attach path invokes this CPU hotplug sysfs callback.\nAC:L - Once enough CPU hotplug states are registered (plausible on cloud servers, KVM hosts, Android, and heavily configured distros with hundreds of cpuhp_setup_state() users), a single read deterministically executes unbounded sprintf() past the PAGE_SIZE buffer with no race or attacker-uncontrollable timing.\nPR:L - states is DEVICE_ATTR_RO (mode 0444), so any unprivileged local user can open and read /sys/devices/system/cpu/hotplug/states. states_show() performs no capability, namespace, or credential check before formatting output into the sysfs buffer.\nUI:N - Exploitation requires only the attacker reading the sysfs attribute; no victim mount, driver bind, module load, or other interactive action is needed beyond the attacker's own read once sufficient hotplug states exist at boot.\nS:U - The out-of-bounds write corrupts kernel heap memory within the same OS/kernel security authority. This is standard kernel memory corruption, not a KVM guest-to-host escape, IOMMU boundary bypass, or other cross-scope boundary violation.\nC:H - Unbounded sprintf() writes past the fixed PAGE_SIZE buffer allocated by sysfs_kf_seq_show(), corrupting adjacent kmalloc heap memory. Per kernel guidance, this class of memory-corruption OOB write can be leveraged for arbitrary kernel memory disclosure.\nI:H - The vulnerable loop advances buf and repeatedly sprintf()s without bounds, producing a kernel heap out-of-bounds write that can corrupt adjacent objects and enable control-flow hijacking or arbitrary kernel writes per OOB-write scoring guidance.\nA:H - Writing past the PAGE_SIZE sysfs show buffer corrupts adjacent kernel heap objects and can cause immediate kernel oops/panic during the read path or when corrupted adjacent allocations are later used, satisfying High availability impact."
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "27481cf4365a6ff5c9be3590143e7ed434000266",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "2408be459c70ef4250da1a9e50f5478e6b250d61",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "998f66e9ce320f3433f60b948e3698b744754a46",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "61a73a123ac7a7fbc57382531f8cb7092d569aba",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "6cb15b81ff545840048fb0e1a6e827d560dbf367",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "631d53102da9f469c96b882b770336bec095b833",
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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": "98f8cdce1db580b99fce823a48eea2cb2bdb261e",
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"lessThan": "86f436567f2516a0083b210bedc933544826a2c3",
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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": "4.6",
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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": "4.6",
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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": "5.10.265",
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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": "4.6",
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"versionEndExcluding": "5.10.265"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/27481cf4365a6ff5c9be3590143e7ed434000266"
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},
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{
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"url": "https://git.kernel.org/stable/c/2408be459c70ef4250da1a9e50f5478e6b250d61"
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},
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{
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"url": "https://git.kernel.org/stable/c/de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635"
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},
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{
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"url": "https://git.kernel.org/stable/c/998f66e9ce320f3433f60b948e3698b744754a46"
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},
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{
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"url": "https://git.kernel.org/stable/c/61a73a123ac7a7fbc57382531f8cb7092d569aba"
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},
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{
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"url": "https://git.kernel.org/stable/c/6cb15b81ff545840048fb0e1a6e827d560dbf367"
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},
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{
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"url": "https://git.kernel.org/stable/c/631d53102da9f469c96b882b770336bec095b833"
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},
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{
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"url": "https://git.kernel.org/stable/c/86f436567f2516a0083b210bedc933544826a2c3"
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}
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],
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"title": "cpu: hotplug: Bound hotplug states sysfs output",
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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-2026-72066",
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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": "2026-10-16T15:51:15.720754Z"
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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-120",
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"description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
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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": "2026-10-19T21:19:26.150Z"
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}
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}
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]
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}
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} |