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-2026-46327",
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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": "2026-05-13T15:03:33.112Z",
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"datePublished": "2026-06-09T12:25:54.781Z",
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"dateUpdated": "2026-10-19T19:36:58.906Z"
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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": "2026-08-05T12:31:22.716Z"
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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\ndm: fix unlocked test for dm_suspended_md\n\nThe function dm_blk_report_zones tests if the device is suspended with\nthe \"dm_suspended_md\" call. However, this function is called without\nholding any locks, so the device may be suspended just after it.\n\nMove the call to dm_suspended_md after dm_get_live_table, so that the\ndevice can't be suspended after the suspended state was tested."
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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 vulnerable code is reached only through local block-layer ioctls (BLKREPORTZONE/BLKREPORTZONEV2 via blkdev_report_zones_ioctl) and device-mapper control ioctls that trigger dm_swap_table/dm_revalidate_zones; there is no network-facing entry point.\nAC:L - Exploitation is a TOCTOU race between concurrent BLKREPORTZONE calls and a zoned dm table activation/revalidation; an attacker can control both sides by running parallel threads and retrying until the window is hit, without depending on uncontrollable timing or memory layout.\nPR:L - Triggering dm table load/swap and zone revalidation requires CAP_SYS_ADMIN, which is obtainable by an unprivileged user inside a user namespace (unshare -Urn); BLKREPORTZONE additionally requires read access to the dm block device, which the same attacker can grant when creating the device.\nUI:N - No victim interaction is required once the attacker has the needed privileges and device access; the race can be driven entirely by attacker-controlled ioctl threads during dm-crypt zoned table setup.\nS:U - The use-after-free corrupts kernel heap metadata and zone-write-plug structures within kernel memory; it does not cross a VM, container, or IOMMU security boundary to affect a separate authority.\nC:H - The bug revives the CVE-2025-38141 class use-after-free where disk_free_zone_resources() can free zone_wplugs_hash/zones_cond while dm_blk_report_zones() still reads them through the live table path, enabling disclosure of freed kernel heap contents.\nI:H - Use-after-free on zone write plug and zone-condition structures provides attacker-influencable heap corruption primitives that can be developed into arbitrary kernel memory writes or control-flow hijack, not merely a bounded modification.\nA:H - Concurrent access to freed zone resources during failed blk_revalidate_disk_zones() can cause kernel oops/panic from dereferencing freed zone_wplugs_hash, zones_cond, or related structures, 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/md/dm-zone.c"
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],
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"versions": [
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{
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"version": "f9c1bdf24615303d48a2d0fd629c88f3189563aa",
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"lessThan": "175ac0a6115400278d3900f5a04a58b17b3f6cd0",
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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": "37f53a2c60d03743e0eacf7a0c01c279776fef4e",
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"lessThan": "7a3385e97af2b6f485fef11e82d8c29adee4be93",
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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": "37f53a2c60d03743e0eacf7a0c01c279776fef4e",
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"lessThan": "d809a36692ee1394cac85ce6ba7cf8ea58da5812",
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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": "37f53a2c60d03743e0eacf7a0c01c279776fef4e",
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"lessThan": "24c405fdbe215c45e57bba672cc42859038491ee",
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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": "d19bc1b4dd5f322980b1f05f79b2ea4f0db10920",
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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": "6.12.34",
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"lessThan": "6.12.75",
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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": "6.15.3",
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"lessThan": "6.16",
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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/md/dm-zone.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.12.75",
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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": "6.18.14",
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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": "6.19.4",
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"lessThanOrEqual": "6.19.*",
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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",
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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": "6.12.34",
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"versionEndExcluding": "6.12.75"
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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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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.14"
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"versionEndExcluding": "7.0"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15.3"
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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/175ac0a6115400278d3900f5a04a58b17b3f6cd0"
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},
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{
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"url": "https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93"
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},
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{
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"url": "https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812"
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},
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{
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"url": "https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee"
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}
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],
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"title": "dm: fix unlocked test for dm_suspended_md",
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"x_generator": {
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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-2026-46327",
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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": "2026-10-16T15:22:16.430684Z"
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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": "2026-10-19T19:36:58.906Z"
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}
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}
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]
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}
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} |