246 lines
13 KiB
JSON
246 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-2026-68427",
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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": "2026-07-30T09:28:09.392Z",
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"datePublished": "2026-08-10T12:04:47.915Z",
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"dateUpdated": "2026-10-19T21:09:09.990Z"
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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": "2026-08-19T16:35:22.452Z"
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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\ngpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings\n\n__host1x_bo_unpin() drops the last reference to the mapping and frees\nit, so we can't dereference mapping afterwards. The cache itself\noutlives the mapping, so use the cache local variable instead."
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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 path is reached only through the Tegra DRM/KMS device node (/dev/dri/card0): a local process pins a GEM buffer as a scanout framebuffer via an atomic commit and then destroys the handle, invoking tegra_bo_free_object() -> host1x_bo_clear_cached_mappings(). No network or remote input reaches this code.\nAC:L - The use-after-free is unconditional and deterministic — every cached mapping freed by host1x_bo_clear_cached_mappings() is dereferenced again for the mutex_unlock. No race must be won and no special memory layout is needed; the attacker fully controls buffer creation, scanout pinning, and the destroy that triggers the free.\nPR:L - An unprivileged local user with access to the Tegra DRM device (video/graphics group, the logged-in console/compositor user on Android, automotive and embedded Tegra systems) can create GEM buffers, present them on a plane and free them. No root or CAP_SYS_ADMIN is required.\nUI:N - The attacking process performs the whole sequence itself — GEM allocation, atomic plane commit, and handle destruction — with no action by any other user or victim process.\nS:U - The corruption stays within the kernel's own memory and security authority; there is no crossing into another VM, IOMMU domain, or sandbox boundary.\nC:H - The freed host1x_bo_mapping is read after kfree() to obtain the cache pointer; with slab reuse the attacker can groom the freed object so the read returns attacker-influenced data, and the resulting UAF primitive can be leveraged to disclose kernel memory contents.\nI:H - mutex_unlock() writes to the lock word at the address read from freed memory, so a reallocated/poisoned mapping object yields a write through an attacker-influenceable pointer — a classic UAF write primitive usable for heap corruption and control-flow hijacking.\nA:H - Dereferencing the freed mapping reliably oopses under slab poisoning/KASAN, and unlocking a bogus mutex address corrupts kernel state, causing a panic or hang; the sequence can be repeated at will to keep the system down."
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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/gpu/host1x/bus.c"
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],
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"versions": [
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{
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"version": "af755456299d44e4ed6af3b7c70a7f03ea37fdf1",
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"lessThan": "86a9bd8c8f422d5f3079da31e151868902fcc702",
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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": "71c017b3f83ff72638f2a1b1d6d4e7bc61d30231",
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"lessThan": "abeff53233b984571b87582bb588b4b38ef4ea50",
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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": "0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602",
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"lessThan": "5b7e5f84d3d4cea10c3764d2da274810a7934228",
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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": "8c0d3cf0d5108c96317e0eca92b60dd368867cef",
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"lessThan": "5f4de3c717d34a24d555af581947742980778c02",
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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": "df63c76f9c8d881ca7bce1aecfba512328d0527d",
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"lessThan": "b773faa32b0a98c3eb2b50d96de631681e5d1157",
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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": "3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc",
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"lessThan": "266cddf7bd0f6c79b6c0633aef742a22bf70265b",
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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": "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/gpu/host1x/bus.c"
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],
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"versions": [
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{
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"version": "6.1.178",
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"lessThan": "6.1.183",
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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": "6.6.145",
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"lessThan": "6.6.148",
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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": "6.12.97",
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"lessThan": "6.12.101",
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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": "6.18.40",
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"lessThan": "6.18.42",
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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": "7.1.5",
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"lessThan": "7.1.6",
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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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"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": "6.1.178",
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"versionEndExcluding": "6.1.183"
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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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]
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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/86a9bd8c8f422d5f3079da31e151868902fcc702"
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},
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{
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"url": "https://git.kernel.org/stable/c/abeff53233b984571b87582bb588b4b38ef4ea50"
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},
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{
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"url": "https://git.kernel.org/stable/c/5b7e5f84d3d4cea10c3764d2da274810a7934228"
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},
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{
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"url": "https://git.kernel.org/stable/c/5f4de3c717d34a24d555af581947742980778c02"
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},
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{
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"url": "https://git.kernel.org/stable/c/b773faa32b0a98c3eb2b50d96de631681e5d1157"
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},
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{
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"url": "https://git.kernel.org/stable/c/266cddf7bd0f6c79b6c0633aef742a22bf70265b"
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}
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],
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"title": "gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings",
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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-2026-68427",
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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": "2026-10-16T15:48:49.447311Z"
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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-416",
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"description": "CWE-416 Use After Free"
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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": "2026-10-19T21:09:09.990Z"
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}
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}
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]
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}
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} |