386 lines
19 KiB
JSON
386 lines
19 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-2026-43093",
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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": "2026-05-01T14:12:55.984Z",
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"datePublished": "2026-05-06T07:40:25.266Z",
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"dateUpdated": "2026-10-19T19:06:13.475Z"
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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": "2026-08-05T12:25:53.221Z"
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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\nxsk: tighten UMEM headroom validation to account for tailroom and min frame\n\nThe current headroom validation in xdp_umem_reg() could leave us with\ninsufficient space dedicated to even receive minimum-sized ethernet\nframe. Furthermore if multi-buffer would come to play then\nskb_shared_info stored at the end of XSK frame would be corrupted.\n\nHW typically works with 128-aligned sizes so let us provide this value\nas bare minimum.\n\nMulti-buffer setting is known later in the configuration process so\nbesides accounting for 128 bytes, let us also take care of tailroom space\nupfront."
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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 UMEM headroom value is supplied through local AF_XDP socket setup via socket(), setsockopt(SOL_XDP, XDP_UMEM_REG), and bind(); network packets may later exercise the bad layout, but they do not create it.\nAC:L - The attacker controls the UMEM chunk size/headroom and AF_XDP setup parameters, and no race or rare timing condition is required.\nPR:L - AF_XDP socket creation requires CAP_NET_RAW in the network namespace and related XDP/BPF setup uses namespace-capable networking privileges, which are reachable by a low-privileged local user through user namespaces in reasonable configurations.\nUI:N - No victim action is needed once the attacker can run the local setup and drive traffic through the socket.\nS:U - The impact remains within the kernel/networking security authority and does not cross a VM, IOMMU, or similar scope boundary.\nC:H - The invalid UMEM geometry can corrupt skb_shared_info/fragment metadata consumed by kernel XDP/AF_XDP paths; under the required overestimation rule, this kernel metadata corruption is treated as capable of enabling high-impact information disclosure.\nI:H - The bug permits attacker-controlled layout overlap with kernel-used XDP fragment metadata, creating a plausible memory-corruption primitive rather than a mere validation failure.\nA:H - Malformed AF_XDP receive geometry can leave insufficient space even for minimum frames and corrupt multi-buffer metadata, making kernel/network path crashes or severe disruption plausible."
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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/xdp/xdp_umem.c"
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],
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"versions": [
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{
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"version": "99e3a236dd43d06c65af0a2ef9cb44306aef6e02",
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"status": "affected",
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"status": "affected",
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},
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{
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"version": "ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee",
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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": "25c9cdef57488578da21d99eb614b97ffcf6e59f",
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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": "98d3c852e63b49129515dd18c875999efaf8530a",
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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": "4.19.118",
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"lessThan": "4.20",
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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": "5.4.35",
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"lessThan": "5.5",
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"status": "affected",
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},
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{
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{
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"net/xdp/xdp_umem.c"
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],
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"status": "affected"
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"version": "0",
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"status": "unaffected",
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{
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"version": "5.10.258",
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},
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{
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"version": "5.15.209",
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"status": "unaffected",
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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{
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"version": "6.6.136",
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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": "6.12.83",
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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": "6.18.24",
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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": "6.19.14",
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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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"operator": "OR",
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},
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{
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{
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"url": "https://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104"
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{
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"url": "https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f"
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},
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{
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"url": "https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1"
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},
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{
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"url": "https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12"
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},
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{
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"url": "https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39"
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},
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{
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"url": "https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931"
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}
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],
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"title": "xsk: tighten UMEM headroom validation to account for tailroom and min frame",
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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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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:19:05.318Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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}
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],
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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}
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]
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},
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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-2026-43093",
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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": "2026-10-16T15:14:34.453140Z"
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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-787",
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"description": "CWE-787 Out-of-bounds Write"
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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": "2026-10-19T19:06:13.475Z"
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}
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}
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]
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}
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} |