214 lines
14 KiB
JSON
214 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-2023-53762",
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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": "2025-12-08T01:18:04.281Z",
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"datePublished": "2025-12-08T01:19:23.927Z",
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"dateUpdated": "2026-10-03T10:55:01.032Z"
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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": "2026-10-03T10:55:01.032Z"
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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 UAF in hci_disconnect_all_sync\n\nUse-after-free can occur in hci_disconnect_all_sync if a connection is\ndeleted by concurrent processing of a controller event.\n\nTo prevent this the code now tries to iterate over the list backwards\nto ensure the links are cleanup before its parents, also it no longer\nrelies on a cursor, instead it always uses the last element since\nhci_abort_conn_sync is guaranteed to call hci_conn_del.\n\nUAF crash log:\n==================================================================\nBUG: KASAN: slab-use-after-free in hci_set_powered_sync\n(net/bluetooth/hci_sync.c:5424) [bluetooth]\nRead of size 8 at addr ffff888009d9c000 by task kworker/u9:0/124\n\nCPU: 0 PID: 124 Comm: kworker/u9:0 Tainted: G W\n6.5.0-rc1+ #10\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n1.16.2-1.fc38 04/01/2014\nWorkqueue: hci0 hci_cmd_sync_work [bluetooth]\nCall Trace:\n <TASK>\n dump_stack_lvl+0x5b/0x90\n print_report+0xcf/0x670\n ? __virt_addr_valid+0xdd/0x160\n ? hci_set_powered_sync+0x2c9/0x4a0 [bluetooth]\n kasan_report+0xa6/0xe0\n ? hci_set_powered_sync+0x2c9/0x4a0 [bluetooth]\n ? __pfx_set_powered_sync+0x10/0x10 [bluetooth]\n hci_set_powered_sync+0x2c9/0x4a0 [bluetooth]\n ? __pfx_hci_set_powered_sync+0x10/0x10 [bluetooth]\n ? __pfx_lock_release+0x10/0x10\n ? __pfx_set_powered_sync+0x10/0x10 [bluetooth]\n hci_cmd_sync_work+0x137/0x220 [bluetooth]\n process_one_work+0x526/0x9d0\n ? __pfx_process_one_work+0x10/0x10\n ? __pfx_do_raw_spin_lock+0x10/0x10\n ? mark_held_locks+0x1a/0x90\n worker_thread+0x92/0x630\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x196/0x1e0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x2c/0x50\n </TASK>\n\nAllocated by task 1782:\n kasan_save_stack+0x33/0x60\n kasan_set_track+0x25/0x30\n __kasan_kmalloc+0x8f/0xa0\n hci_conn_add+0xa5/0xa80 [bluetooth]\n hci_bind_cis+0x881/0x9b0 [bluetooth]\n iso_connect_cis+0x121/0x520 [bluetooth]\n iso_sock_connect+0x3f6/0x790 [bluetooth]\n __sys_connect+0x109/0x130\n __x64_sys_connect+0x40/0x50\n do_syscall_64+0x60/0x90\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nFreed by task 695:\n kasan_save_stack+0x33/0x60\n kasan_set_track+0x25/0x30\n kasan_save_free_info+0x2b/0x50\n __kasan_slab_free+0x10a/0x180\n __kmem_cache_free+0x14d/0x2e0\n device_release+0x5d/0xf0\n kobject_put+0xdf/0x270\n hci_disconn_complete_evt+0x274/0x3a0 [bluetooth]\n hci_event_packet+0x579/0x7e0 [bluetooth]\n hci_rx_work+0x287/0xaa0 [bluetooth]\n process_one_work+0x526/0x9d0\n worker_thread+0x92/0x630\n kthread+0x196/0x1e0\n ret_from_fork+0x2c/0x50\n=================================================================="
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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 freeing side of the race is `hci_disconn_complete_evt()` processed from HCI events generated by a peer Bluetooth device terminating a link or causing link-supervision timeout, so the attacker must be a device within Bluetooth radio range. Bluetooth reachability is scored Adjacent.\nAC:L - The attacker controls the free side entirely (link teardown timing and the multi-link ACL/SCO or LE/CIS topology that makes `hci_conn_unlink()` cascade a `hci_conn_del()` onto the loop's cached cursor), and the window is wide because `hci_disconnect_sync()` sleeps on `HCI_CMD_TIMEOUT` without waiting for Disconnect Complete. The victim-side trigger (adapter power-off or the routine autosuspend path via `hci_suspend_sync()`) recurs constantly, and attempts can be retried indefinitely.\nPR:N - The attacker needs no account, capability, or credential on the target host — only an in-range Bluetooth link, which for LE/L2CAP/CIS can be established without pairing. No local privilege on the victim is required to deliver the disconnect that frees the `hci_conn`.\nUI:N - `hci_disconnect_all_sync()` is reached automatically by `hci_suspend_sync()` on every system/auto suspend that has active connections, and by rfkill/adapter power-down performed by system daemons. No deliberate victim action is needed.\nS:U - The corruption stays within the kernel's own security authority; there is no crossing into a hypervisor, IOMMU, or other separate security scope.\nC:H - The freed `hci_conn` is read after free (`conn->state`, `conn->handle`, `conn->type`, `conn->dst`) from a sprayable general kmalloc cache, letting an attacker who reallocates the slot both leak kernel memory contents and steer subsequent reads for arbitrary disclosure.\nI:H - The dangling object is passed on to `hci_conn_failed()`/`hci_conn_del()`, which performs `list_del` on attacker-controlled list pointers (write primitive) and calls the `conn->cleanup(conn)` function pointer out of freed memory in `hci_conn_cleanup()`, giving control-flow hijack and privilege escalation potential.\nA:H - The confirmed KASAN slab-use-after-free in the `hci_cmd_sync_work` kernel worker crashes the kernel, and it can be re-triggered on every power-off/suspend cycle for persistent 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_sync.c"
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],
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"versions": [
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{
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"version": "182ee45da083db4e3e621541ccf255bfa9652214",
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"lessThan": "5e3ee972f185eb7957ce789b3bf13a3cb790f178",
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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": "182ee45da083db4e3e621541ccf255bfa9652214",
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"lessThan": "a30c074f0b5b7f909a15c978fbc96a29e2f94e42",
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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": "182ee45da083db4e3e621541ccf255bfa9652214",
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"lessThan": "ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4",
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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": "182ee45da083db4e3e621541ccf255bfa9652214",
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"lessThan": "94d9ba9f9888b748d4abd2aa1547af56ae85f772",
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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": "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": "6.1.189",
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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": "6.4.16",
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"lessThanOrEqual": "6.4.*",
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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": "6.5.3",
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"lessThanOrEqual": "6.5.*",
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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": "6.6",
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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": "6.1.189"
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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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"versionEndExcluding": "6.4.16"
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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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"versionEndExcluding": "6.5.3"
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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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"versionEndExcluding": "6.6"
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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/5e3ee972f185eb7957ce789b3bf13a3cb790f178"
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},
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{
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"url": "https://git.kernel.org/stable/c/a30c074f0b5b7f909a15c978fbc96a29e2f94e42"
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},
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{
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"url": "https://git.kernel.org/stable/c/ba3ba53ce1f76fc372b8f918fece4f9b1e41acd4"
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},
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{
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"url": "https://git.kernel.org/stable/c/94d9ba9f9888b748d4abd2aa1547af56ae85f772"
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}
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],
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"title": "Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync",
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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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"timestamp": "2026-06-16T15:46:42.482426Z",
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"id": "CVE-2023-53762",
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2026-06-16T15:47:51.661Z"
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}
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}
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]
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}
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} |