268 lines
14 KiB
JSON
268 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-2026-68287",
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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": "2026-07-30T09:28:09.380Z",
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"datePublished": "2026-08-10T12:02:20.110Z",
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"dateUpdated": "2026-10-19T20:58:59.639Z"
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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": "2026-10-03T10:55:42.919Z"
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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\ndrop_monitor: fix size calculations for 64-bit attributes\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() use\nnla_put_u64_64bit() to append 64-bit attributes (NET_DM_ATTR_PC and\nNET_DM_ATTR_TIMESTAMP).\n\nOn 32-bit architectures without CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS,\nnla_put_u64_64bit() may append a 4-byte NET_DM_ATTR_PAD attribute for\n64-bit alignment.\n\nHowever, net_dm_packet_report_size() and net_dm_hw_packet_report_size()\nused nla_total_size(sizeof(u64)) instead of nla_total_size_64bit(sizeof(u64)),\nbudgeting 12 bytes instead of up to 16 bytes.\n\nThis under-estimation of SKB size can lead to an skb_over_panic() when\n__nla_reserve() or skb_put() is subsequently called.\n\nFix this by using nla_total_size_64bit(sizeof(u64)) in both size calculations."
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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:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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 report path runs in net/core/drop_monitor.c whenever a received packet is dropped or hardware-trapped; a remote unauthenticated attacker triggers it simply by sending packets that get dropped, and controls skb->len which feeds payload_len and thus the under-sized allocation.\nAC:L - On an affected build the attacker can drive the path at will, tuning packet length byte-by-byte to land the under-budgeted skb exactly at an allocator bucket boundary; no race or unpredictable state is involved.\nPR:N - Enabling packet-alert mode is the victim administrator's monitoring configuration; the attacker's own action is only sending packets that get dropped, which needs no account, credentials or privileges on the target.\nUI:N - The drop-report path is executed automatically by the kernel workqueue when packets are dropped; no local user action is needed.\nS:U - The under-allocated skb and the resulting skb_over_panic() are entirely within the kernel's own security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:N - __nla_reserve() detects the overrun in skb_put() and panics before any data is written or read past the buffer, so no memory contents are disclosed to the attacker.\nI:N - skb_over_panic() aborts before the out-of-bounds payload copy occurs, so no adjacent memory is modified and no control-flow primitive is obtained.\nA:H - The size under-estimation makes skb_put() exceed skb->end, invoking skb_over_panic() which calls BUG() and takes down the machine, a complete and repeatable denial of service."
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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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"net/core/drop_monitor.c"
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],
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"versions": [
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{
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"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
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"lessThan": "1275a4769c126405c6c63b6372daff120ac679a6",
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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": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
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"lessThan": "0da8f531336b28a59b23e5a67d40eaed15906201",
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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": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
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"lessThan": "6048ed2dfb33426c8aef32f8d225ea91c66813db",
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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": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
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"lessThan": "925669d4cfd47a9019ab29b40676215bab5dae35",
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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": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
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"lessThan": "4a9e30764e80693bcf875c776170edce20f94fe0",
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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": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
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"lessThan": "7089f7ab99c89f443c92d8fcc585e63f2727f0b3",
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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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"net/core/drop_monitor.c"
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],
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"versions": [
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{
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"version": "5.4",
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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": "5.4",
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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": "6.1.189",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.53",
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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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.4",
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"versionEndExcluding": "6.1.189"
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"vulnerable": true,
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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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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1275a4769c126405c6c63b6372daff120ac679a6"
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},
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{
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"url": "https://git.kernel.org/stable/c/0da8f531336b28a59b23e5a67d40eaed15906201"
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},
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{
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"url": "https://git.kernel.org/stable/c/6048ed2dfb33426c8aef32f8d225ea91c66813db"
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},
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{
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"url": "https://git.kernel.org/stable/c/925669d4cfd47a9019ab29b40676215bab5dae35"
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},
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{
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"url": "https://git.kernel.org/stable/c/4a9e30764e80693bcf875c776170edce20f94fe0"
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},
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{
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"url": "https://git.kernel.org/stable/c/7089f7ab99c89f443c92d8fcc585e63f2727f0b3"
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}
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],
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"title": "drop_monitor: fix size calculations for 64-bit attributes",
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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-2026-68287",
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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": "yes"
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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": "2026-10-16T15:46:36.312836Z"
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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-131",
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"description": "CWE-131 Incorrect Calculation of Buffer Size"
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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": "2026-10-19T20:58:59.639Z"
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}
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}
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]
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}
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} |