338 lines
17 KiB
JSON
338 lines
17 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-2026-53256",
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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": "2026-06-09T07:44:35.394Z",
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"datePublished": "2026-06-25T08:39:46.591Z",
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"dateUpdated": "2026-10-19T19:57:32.092Z"
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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": "2026-08-05T12:34:36.875Z"
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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\nBluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind()\n\nrfcomm_get_sock_by_channel() scans rfcomm_sk_list under the list lock,\nbut returns the selected listener after dropping that lock without\ntaking a reference. rfcomm_connect_ind() then locks the listener,\nqueues a child socket on it, and may notify it after unlocking it.\n\nThe buggy scenario involves two paths, with each column showing the\norder within that path:\n\nrfcomm_connect_ind(): listener close:\n 1. Find parent in 1. close() enters\n rfcomm_get_sock_by_channel() rfcomm_sock_release().\n 2. Drop rfcomm_sk_list.lock 2. rfcomm_sock_shutdown()\n without pinning parent. closes the listener.\n 3. Call lock_sock(parent) and 3. rfcomm_sock_kill()\n bt_accept_enqueue(parent, unlinks and puts parent.\n sk, true).\n 4. Read parent flags and may 4. parent can be freed.\n call sk_state_change().\n\nIf close wins the race, parent can be freed before\nrfcomm_connect_ind() reaches lock_sock(), bt_accept_enqueue(), or the\ndeferred-setup callback.\n\nTake a reference on the listener before leaving rfcomm_sk_list.lock.\nAfter lock_sock() succeeds, recheck that it is still in BT_LISTEN\nbefore queueing a child, cache the deferred-setup bit while the parent\nis locked, and drop the reference after the last parent use.\n\nKASAN reported a slab-use-after-free in lock_sock_nested() from\nrfcomm_connect_ind(), with the freeing stack going through\nrfcomm_sock_kill() and rfcomm_sock_release()."
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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:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 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:A - The vulnerable path is reached by Bluetooth RFCOMM/L2CAP traffic from a nearby peer, so the attacker must be within Bluetooth radio range rather than merely local or internet-routable.\nAC:L - The race is between an inbound RFCOMM connect indication and listener close; an attacker with an unprivileged local RFCOMM listener plus a controlled adjacent Bluetooth peer can drive both sides repeatedly.\nPR:L - Creating, binding, listening on, and closing an RFCOMM stream socket has no CAP_NET_ADMIN gate, so only low local privileges are needed to control the listener side of the race.\nUI:N - No victim user action is required once the vulnerable listener/race setup exists; the attacker drives the RFCOMM connection attempts and close timing.\nS:U - The corruption is within the kernel networking/Bluetooth socket lifetime domain and does not cross a separate security authority such as a VM or IOMMU boundary.\nC:H - This is a slab use-after-free of a kernel struct sock, and the stale pointer is reused for locking, queueing, state checks, and callback-related state, making high confidentiality impact defensible.\nI:H - The stale listener socket can be operated on after free, including accept-queue manipulation and potential callback use, so kernel memory corruption/control-flow exploitation is defensible.\nA:H - KASAN reported a slab-use-after-free in this path, and even non-exploited triggering can crash or oops the kernel."
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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/bluetooth/rfcomm/sock.c"
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],
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"versions": [
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "f5ec76bdbeb80f75ad0be204371afffee0f8fac8",
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"status": "affected",
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"status": "affected",
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "43c441edacf953b39517a44f5e5e10a93618b226",
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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/bluetooth/rfcomm/sock.c"
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],
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"versions": [
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{
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"version": "2.6.12",
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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": "2.6.12",
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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": "5.10.259",
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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": "5.15.210",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "6.1.176",
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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": "6.6.143",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.12.94",
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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": "6.18.36",
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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": "7.0.13",
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"lessThanOrEqual": "7.0.*",
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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",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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},
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"url": "https://git.kernel.org/stable/c/a07d741c077d4e34b16458241a94d29039386553"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f73f92f66251065a5f39b09a47cf05ea14d3107"
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},
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{
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"url": "https://git.kernel.org/stable/c/de31973ef00e5aa55496f84cf6a44bb157a34e02"
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},
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{
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"url": "https://git.kernel.org/stable/c/b0e33e409715c617e2a20f46f99aa5403a14dfda"
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},
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},
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{
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"url": "https://git.kernel.org/stable/c/43c441edacf953b39517a44f5e5e10a93618b226"
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}
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],
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"title": "Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind()",
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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": "2026-10-15T01:23:03.918Z"
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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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}
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],
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}
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],
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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-2026-53256",
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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": "2026-10-16T15:27:52.306248Z"
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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": "2026-10-19T19:57:32.092Z"
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}
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}
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]
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}
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} |