279 lines
14 KiB
JSON
279 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-2026-46138",
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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": "2026-05-13T15:03:33.100Z",
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"datePublished": "2026-05-28T09:35:54.467Z",
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"dateUpdated": "2026-10-19T19:36:52.126Z"
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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": "2026-08-05T12:30:00.334Z"
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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: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt\n\nhci_le_create_big_complete_evt() iterates over BT_BOUND connections for\na BIG handle using a while loop, accessing ev->bis_handle[i++] on each\niteration. However, there is no check that i stays within ev->num_bis\nbefore the array access.\n\nWhen a controller sends a LE_Create_BIG_Complete event with fewer\nbis_handle entries than there are BT_BOUND connections for that BIG,\nor with num_bis=0, the loop reads beyond the valid bis_handle[] flex\narray into adjacent heap memory. Since the out-of-bounds values\ntypically exceed HCI_CONN_HANDLE_MAX (0x0EFF), hci_conn_set_handle()\nrejects them and the connection remains in BT_BOUND state. The same\nconnection is then found again by hci_conn_hash_lookup_big_state(),\ncreating an infinite loop with hci_dev_lock held.\n\nFix this by terminating the BIG if in case not all BIS could be setup\nproperly."
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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:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 8.1,
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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 handler is in the Bluetooth ISO/BIS stack; per kernel CNA convention Bluetooth subsystem bugs are reachable by an attacker within Bluetooth radio range, i.e. the adjacent vector.\nAC:L - An event with num_bis=0 (or fewer bis_handle entries than bound connections) deterministically triggers the OOB read and the infinite loop; the OOB heap values reliably exceed HCI_CONN_HANDLE_MAX, so no uncontrolled condition is required.\nPR:N - Exploitation requires no privileges or credentials on the target host; the malformed BIG-complete event is processed without any authentication gate.\nUI:N - No victim interaction is needed at exploit time — the device merely has to be operating as a BIS broadcaster, which is a configuration state, not a per-attack user action.\nS:U - The OOB read and the hang are confined to the kernel's own security authority; no boundary such as a VM/hypervisor or IOMMU is crossed.\nC:H - The loop reads the bis_handle[] flex array out of bounds into adjacent heap memory (up to ~512 bytes), well beyond a few bounded bytes, which under kernel guidance is scored High.\nI:N - The bug path performs only an out-of-bounds read and a spinning lookup; there is no out-of-bounds write or memory corruption that modifies kernel state.\nA:H - The OOB values keep the connection in BT_BOUND, producing an infinite loop while hci_dev_lock is held, which hangs the HCI device and causes a 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/bluetooth/hci_event.c"
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],
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"versions": [
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{
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"version": "a0bfde167b506423111ddb8cd71930497a40fc54",
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"lessThan": "6cb7f67bc28da787499291a562d49a084d9c90cd",
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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": "a0bfde167b506423111ddb8cd71930497a40fc54",
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"lessThan": "22559ad7654f61727fc270ee4893da9f4b70cf17",
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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": "a0bfde167b506423111ddb8cd71930497a40fc54",
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"lessThan": "77981a507aa0fc001dc37f0dd6631dd2042fed17",
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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": "a0bfde167b506423111ddb8cd71930497a40fc54",
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"lessThan": "665da0baaf0396f9ed3c86ccb3955dcd0b73e774",
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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": "a0bfde167b506423111ddb8cd71930497a40fc54",
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"lessThan": "5ddb8014261137cadaf83ab5617a588d80a22586",
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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": "b475c1109251e30ec21fb574d72a1c71a4ab0039",
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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": "2ccde10127447c1a5caad8469fede945bdb62fdf",
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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": "6.4.16",
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"lessThan": "6.5",
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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": "6.5.3",
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"lessThan": "6.6",
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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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"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/hci_event.c"
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],
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"versions": [
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{
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"version": "6.6",
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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": "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": "6.6.140",
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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": "6.12.88",
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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": "6.18.30",
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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": "7.0.7",
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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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{
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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": "6.6",
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"versionEndExcluding": "6.6.140"
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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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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.12.88"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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{
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{
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "7.1"
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{
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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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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6cb7f67bc28da787499291a562d49a084d9c90cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/22559ad7654f61727fc270ee4893da9f4b70cf17"
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},
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{
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"url": "https://git.kernel.org/stable/c/77981a507aa0fc001dc37f0dd6631dd2042fed17"
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},
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{
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"url": "https://git.kernel.org/stable/c/665da0baaf0396f9ed3c86ccb3955dcd0b73e774"
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},
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{
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"url": "https://git.kernel.org/stable/c/5ddb8014261137cadaf83ab5617a588d80a22586"
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}
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],
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"title": "Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt",
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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-2026-46138",
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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": "2026-10-16T15:20:20.651932Z"
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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-125",
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"description": "CWE-125 Out-of-bounds Read"
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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": "2026-10-19T19:36:52.126Z"
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}
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}
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]
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}
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} |