272 lines
15 KiB
JSON
272 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-2026-74509",
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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": "2026-08-15T05:44:03.909Z",
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"datePublished": "2026-08-15T12:27:31.896Z",
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"dateUpdated": "2026-10-16T19:05:51.377Z"
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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": "2026-08-27T12:39:46.394Z"
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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_sync: Fix advertising data UAFs\n\nhci_find_adv_instance() returns an adv_info pointer that is valid only\nwhile hdev->lock is held. The advertising command-sync paths perform\ninstance lookups without that lock and, in some cases, retain the pointer\nwhile waiting for a controller response.\n\nAn advertising termination event can therefore interleave as follows:\n\n hci_cmd_sync_work hci_rx_work\n hci_find_adv_instance()\n __hci_cmd_sync_status()\n wait for controller reply hci_dev_lock()\n hci_remove_adv_instance()\n kfree(adv)\n adv->scan_rsp_changed = false\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in hci_set_ext_scan_rsp_data_sync+0x2e1/0x300\n Write of size 1 at addr ffff88810a45d21d by task kworker/u17:0/88\n Workqueue: hci0 hci_cmd_sync_work\n Call Trace:\n hci_set_ext_scan_rsp_data_sync+0x2e1/0x300\n hci_schedule_adv_instance_sync+0x390/0x4c0\n hci_cmd_sync_work+0x173/0x300\n Allocated by task 87:\n hci_add_adv_instance+0x538/0xac0\n add_advertising+0x885/0x1160\n Freed by task 89:\n kfree+0x131/0x3c0\n hci_remove_adv_instance+0x1d8/0x3b0\n hci_le_ext_adv_term_evt+0x17b/0x730\n\nProtect the instance lookup and payload construction in the extended\nadvertising, scan response, and periodic advertising data paths. Snapshot\nthe advertising parameters under hdev->lock, but release the lock before\nwaiting for the controller.\n\nClear advertising-data dirty bits before issuing their commands and\nrestore them after a failure using a fresh lookup. Likewise, update the\nreported transmit power through a fresh lookup after the parameter command\ncompletes. No adv_info pointer then survives an HCI command wait."
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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:H/A:H",
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"baseScore": 8.8,
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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 bug is in the Bluetooth HCI LE extended-advertising path; a remote/adjacent peer can deliver the LE Extended Advertising Set Terminated HCI event that frees adv_info while hci_cmd_sync_work waits on the controller during scan-response/advertising-data updates on phones and other BLE devices.\nAC:L - This is a use-after-free race between hci_cmd_sync_work and hci_rx_work where the attacker controls the terminating side by repeatedly initiating BLE connections/terminations during the up-to-2s HCI command wait, and can also drive the setup side via MGMT advertising commands.\nPR:N - An adjacent Bluetooth attacker needs no account, credentials, or capabilities on the victim; exploitation only requires the victim stack to be configuring BLE advertising (normal on Android phones, laptops, and IoT) while the attacker sends over-the-air BLE traffic to trigger hci_le_ext_adv_term_evt.\nUI:N - No deliberate victim action is required beyond a device running Bluetooth with LE advertising updates (common default behavior); the attacker triggers the race remotely without social engineering, file opens, or mounts.\nS:U - Impact is kernel heap corruption and potential local privilege escalation within the same kernel security domain; it does not cross a VM, container, or IOMMU boundary.\nC:H - Multiple UAF paths read freed adv_info (e.g., eir_create_scan_rsp/adv_data) and retain dangling pointers across __hci_cmd_sync_status waits, enabling slab reuse and arbitrary kernel memory disclosure via heap grooming.\nI:H - KASAN shows a post-free write to adv_info (scan_rsp_changed); similar paths write adv_data_changed and tx_power on freed objects, providing exploitable heap corruption for arbitrary kernel writes and code execution.\nA:H - Use-after-free on adv_info in hci_cmd_sync_work can cause immediate kernel oops/panic or hung BLE subsystem during advertising reconfiguration, and is reachable from unauthenticated adjacent BLE interaction on actively advertising devices."
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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_sync.c"
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],
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"versions": [
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{
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"version": "cba6b758711cab946c787f7c15be92cc749b8e1f",
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"lessThan": "565971488191bf54a87a417abafab6ad0de72201",
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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": "cba6b758711cab946c787f7c15be92cc749b8e1f",
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"lessThan": "c4cec575a6d6f7c36808a3a0017b0675968bb06b",
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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": "cba6b758711cab946c787f7c15be92cc749b8e1f",
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"lessThan": "95cdcd8c82a501931fd3ae9b3811b0b6da167e94",
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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": "cba6b758711cab946c787f7c15be92cc749b8e1f",
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"lessThan": "eb1d8318764de7216e6dbba29a24d69f7ce51348",
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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": "cba6b758711cab946c787f7c15be92cc749b8e1f",
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"lessThan": "b16ebdbebd2d37f4cdc590bc3e9db71fe90350a3",
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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": "cba6b758711cab946c787f7c15be92cc749b8e1f",
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"lessThan": "cdc36db204ffd97b947d64374cf23a210dc74777",
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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": "42fe380baaaccbe635c34ca07b29d19b9ec2498d",
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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": "5.15.210",
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"lessThan": "5.16",
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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_sync.c"
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],
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"versions": [
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{
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"version": "5.17",
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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": "5.17",
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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": "6.1.184",
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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": "6.6.154",
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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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "5.17",
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"versionEndExcluding": "6.1.184"
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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": "5.17",
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{
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.17",
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"versionEndExcluding": "7.1.8"
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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": "5.17",
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"versionEndExcluding": "7.2"
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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": "5.15.210"
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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/565971488191bf54a87a417abafab6ad0de72201"
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},
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{
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"url": "https://git.kernel.org/stable/c/c4cec575a6d6f7c36808a3a0017b0675968bb06b"
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},
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{
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"url": "https://git.kernel.org/stable/c/95cdcd8c82a501931fd3ae9b3811b0b6da167e94"
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},
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{
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"url": "https://git.kernel.org/stable/c/eb1d8318764de7216e6dbba29a24d69f7ce51348"
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},
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{
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"url": "https://git.kernel.org/stable/c/b16ebdbebd2d37f4cdc590bc3e9db71fe90350a3"
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},
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{
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"url": "https://git.kernel.org/stable/c/cdc36db204ffd97b947d64374cf23a210dc74777"
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}
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],
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"title": "Bluetooth: hci_sync: Fix advertising data UAFs",
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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-2026-74509",
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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": "2026-10-16T18:58:37.448836Z"
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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": "2026-10-16T19:05:51.377Z"
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}
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}
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]
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}
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} |