293 lines
15 KiB
JSON
293 lines
15 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-2025-38461",
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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": "2025-04-16T04:51:24.020Z",
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"datePublished": "2025-07-25T15:27:39.322Z",
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"dateUpdated": "2026-08-05T12:02:04.689Z"
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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": "2026-08-05T12:02:04.689Z"
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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\nvsock: Fix transport_* TOCTOU\n\nTransport assignment may race with module unload. Protect new_transport\nfrom becoming a stale pointer.\n\nThis also takes care of an insecure call in vsock_use_local_transport();\nadd a lockdep assert.\n\nBUG: unable to handle page fault for address: fffffbfff8056000\nOops: Oops: 0000 [#1] SMP KASAN\nRIP: 0010:vsock_assign_transport+0x366/0x600\nCall Trace:\n vsock_connect+0x59c/0xc40\n __sys_connect+0xe8/0x100\n __x64_sys_connect+0x6e/0xc0\n do_syscall_64+0x92/0x1c0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53"
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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:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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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 through the AF_VSOCK socket API — `socket(AF_VSOCK, SOCK_DGRAM)` and `connect()` — which requires a local execution context on the target system. Per kernel scoring convention vsock is treated as a local attack vector even though the listener path is also driven by peer packets.\nAC:H - The attacker fully controls one side of the race (a tight `connect()`/`socket()` loop, and can widen the window via transport reassignment through `release()`/`destruct()`), but the other side requires a concurrent vsock transport module unload, which is gated by `capable(CAP_SYS_MODULE)` in the init user namespace and therefore cannot be induced by the attacker at will.\nPR:L - Creating an AF_VSOCK socket and calling connect() requires no capabilities whatsoever — there is no `capable()` gate on `vsock_create()` or `vsock_connect()` — so any unprivileged local user, including one inside an unprivileged container, can drive the racing side.\nUI:N - The attacker's exploitation path is pure syscall activity with no victim action required; the administrative module unload is a system-state precondition already accounted for in Attack Complexity and is not double-counted here.\nS:U - The stale-pointer dereference, wild write and indirect calls all occur in the host kernel's own security authority, which is the same authority that manages the vsock socket. This is standard kernel-level compromise with no crossing of a VM, IOMMU or sandbox boundary.\nC:H - This is a use-after-free on freed module memory: `new_transport->module` and the transport's function pointers are read from a region that has been released by `execmem_free()` and can be reallocated by a subsequent module load. Combined with the indirect calls through those stale pointers, this yields arbitrary kernel memory disclosure.\nI:H - `try_module_get()` performs `atomic_inc_not_zero()` on a `struct module *` read out of freed memory, giving an increment-write through an attacker-influenceable address, and `new_transport->seqpacket_allow()`/`->init()` are indirect calls through function pointers read from that same freed region — a control-flow hijack primitive.\nA:H - The bug is demonstrated by an unrecoverable oops — \"BUG: unable to handle page fault for address: fffffbfff8056000\" at `vsock_assign_transport+0x366` — and any use-after-free of this kind reliably panics the kernel even when not fully weaponized."
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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/vmw_vsock/af_vsock.c"
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],
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"versions": [
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{
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"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "8667e8d0eb46bc54fdae30ba2f4786407d3d88eb",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "36a439049b34cca0b3661276049b84a1f76cc21a",
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"status": "affected",
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"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "9ce53e744f18e73059d3124070e960f3aa9902bf",
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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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "9d24bb6780282b0255b9929abe5e8f98007e2c6e",
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"status": "affected",
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"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "ae2c712ba39c7007de63cb0c75b51ce1caaf1da5",
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"status": "affected",
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"versionType": "git"
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{
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"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "7b73bddf54777fb62d4d8c7729d0affe6df04477",
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"status": "affected",
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{
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"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
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"lessThan": "687aa0c5581b8d4aa87fd92973e4ee576b550cdf",
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"status": "affected",
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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/vmw_vsock/af_vsock.c"
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],
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"versions": [
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{
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"version": "5.5",
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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": "5.5",
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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": "5.10.240",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.189",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.146",
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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": "6.6.99",
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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": "6.12.39",
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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": "6.15.7",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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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"url": "https://git.kernel.org/stable/c/9d24bb6780282b0255b9929abe5e8f98007e2c6e"
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}
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],
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"title": "vsock: Fix transport_* TOCTOU",
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"engine": "bippy-1.2.0"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
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"dateUpdated": "2025-11-03T17:38:21.774Z"
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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-2025-38461",
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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": "2026-06-10T20:41:43.452088Z"
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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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"dateUpdated": "2026-06-11T18:44:15.500Z"
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}
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]
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}
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} |