256 lines
14 KiB
JSON
256 lines
14 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-2026-72440",
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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": "2026-08-09T03:40:39.930Z",
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"datePublished": "2026-08-15T05:56:52.662Z",
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"dateUpdated": "2026-10-30T12:29:25.252Z"
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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": "2026-10-30T12:29:25.252Z"
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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\nmd/raid1: fix writes_pending and barrier reference leaks on write failures\n\nraid1_make_request() acquires a writes_pending reference with\nmd_write_start() before calling raid1_write_request(). Several failure\npaths in raid1_write_request() complete the bio and return without\nreaching the normal write completion path, causing the corresponding\nmd_write_end() to be skipped.\n\nMake raid1_write_request() return a status indicating whether the write\nrequest was successfully queued. This allows raid1_make_request() to\ncall md_write_end() when raid1_write_request() fails.\n\nAdditionally, if wait_blocked_rdev() fails after wait_barrier()\nsucceeds, the associated barrier reference is not released.\n\nCall allow_barrier() before returning from that path to keep the barrier\naccounting balanced."
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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:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
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"baseScore": 7.1,
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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:N - The bug is in md/raid1 write handling reached via block-layer writes to RAID1-backed volumes; on storage servers and appliances, remote NFS, SMB (ksmbd), iSCSI, and NVMe-oF clients submit those writes through md_submit_bio() to raid1_make_request() the same as local I/O.\nAC:L - An attacker with write access can reliably trigger the leaks using RWF_NOWAIT during active resync/barriers, against mirrors in BlockedBadBlocks state after prior write errors, or via bio_submit_split_bioset() failure paths; they control I/O timing and concurrency without uncontrollable races.\nPR:L - Exploitation requires only the ability to issue writes to the RAID1 array—via a mounted filesystem, O_RDWR on /dev/mdX, or an authenticated network storage client—not CAP_SYS_ADMIN or other privileges needed to create or reconfigure the md array.\nUI:N - No victim interaction is required; the attacker or their storage client issues the triggering RWF_NOWAIT or failing write requests directly, with no separate mount, file open, or administrator action needed at exploitation time.\nS:U - Impact is confined to kernel md RAID1 write/barrier accounting and array lifecycle state within the same host kernel; it does not cross VM, container, or IOMMU security boundaries.\nC:N - Leaked writes_pending and nr_pending reference counters do not corrupt memory, read out of bounds, or use-after-free; there is no kernel pointer leak or arbitrary memory disclosure primitive.\nI:L - Skipped md_write_end() on failure paths leaves writes_pending inflated and prevents set_in_sync()/clean sysfs transitions, causing persistent incorrect RAID1 dirty/clean metadata state that cannot be corrected until reboot.\nA:H - Leaked conf->nr_pending from the wait_blocked_rdev()+REQ_NOWAIT path inflates get_unqueued_pending() so freeze_array() wait_event never completes, deadlocking array quiesce, reshape, removal, and read-error recovery while array_frozen blocks new I/O."
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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/md/raid1.c"
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],
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"versions": [
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{
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"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
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"lessThan": "874f54243d881fde1890849000beb88a7880d1ec",
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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": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
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"lessThan": "921e2baa626d1504bf30295816aaeb90ac8c82f4",
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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": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
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"lessThan": "a846affa813013204d0cce0cfdaeb99e8fcce188",
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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": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
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"lessThan": "7a450460687919e79b5f8503bdeb13ecf4cca311",
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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": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
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"lessThan": "bffbbfcbd9393e315a7a4286dcd70e875265db9a",
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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": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
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"lessThan": "8e065a1602511282fc0da2dc89445e0eb71a681c",
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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/md/raid1.c"
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],
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"versions": [
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{
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"version": "5.17",
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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": "5.17",
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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": "6.1.191",
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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": "6.6.160",
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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": "7.1.5",
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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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{
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.17",
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"versionEndExcluding": "6.1.191"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/874f54243d881fde1890849000beb88a7880d1ec"
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},
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{
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"url": "https://git.kernel.org/stable/c/921e2baa626d1504bf30295816aaeb90ac8c82f4"
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"url": "https://git.kernel.org/stable/c/a846affa813013204d0cce0cfdaeb99e8fcce188"
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"url": "https://git.kernel.org/stable/c/7a450460687919e79b5f8503bdeb13ecf4cca311"
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{
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"url": "https://git.kernel.org/stable/c/bffbbfcbd9393e315a7a4286dcd70e875265db9a"
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},
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{
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"url": "https://git.kernel.org/stable/c/8e065a1602511282fc0da2dc89445e0eb71a681c"
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}
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],
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"title": "md/raid1: fix writes_pending and barrier reference leaks on write failures",
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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-2026-72440",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:50:04.662710Z"
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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": "2026-10-16T18:55:24.375Z"
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}
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}
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]
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}
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} |