193 lines
13 KiB
JSON
193 lines
13 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-2024-46680",
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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": "2024-09-11T15:12:18.248Z",
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"datePublished": "2024-09-13T05:29:14.057Z",
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"dateUpdated": "2026-08-05T11:37:55.565Z"
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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": "2026-08-05T11:37:55.565Z"
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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: btnxpuart: Fix random crash seen while removing driver\n\nThis fixes the random kernel crash seen while removing the driver, when\nrunning the load/unload test over multiple iterations.\n\n1) modprobe btnxpuart\n2) hciconfig hci0 reset\n3) hciconfig (check hci0 interface up with valid BD address)\n4) modprobe -r btnxpuart\nRepeat steps 1 to 4\n\nThe ps_wakeup() call in btnxpuart_close() schedules the psdata->work(),\nwhich gets scheduled after module is removed, causing a kernel crash.\n\nThis hidden issue got highlighted after enabling Power Save by default\nin 4183a7be7700 (Bluetooth: btnxpuart: Enable Power Save feature on\nstartup)\n\nThe new ps_cleanup() deasserts UART break immediately while closing\nserdev device, cancels any scheduled ps_work and destroys the ps_lock\nmutex.\n\n[ 85.884604] Unable to handle kernel paging request at virtual address ffffd4a61638f258\n[ 85.884624] Mem abort info:\n[ 85.884625] ESR = 0x0000000086000007\n[ 85.884628] EC = 0x21: IABT (current EL), IL = 32 bits\n[ 85.884633] SET = 0, FnV = 0\n[ 85.884636] EA = 0, S1PTW = 0\n[ 85.884638] FSC = 0x07: level 3 translation fault\n[ 85.884642] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041dd0000\n[ 85.884646] [ffffd4a61638f258] pgd=1000000095fff003, p4d=1000000095fff003, pud=100000004823d003, pmd=100000004823e003, pte=0000000000000000\n[ 85.884662] Internal error: Oops: 0000000086000007 [#1] PREEMPT SMP\n[ 85.890932] Modules linked in: algif_hash algif_skcipher af_alg overlay fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine authenc libdes crct10dif_ce polyval_ce polyval_generic snd_soc_imx_spdif snd_soc_imx_card snd_soc_ak5558 snd_soc_ak4458 caam secvio error snd_soc_fsl_spdif snd_soc_fsl_micfil snd_soc_fsl_sai snd_soc_fsl_utils gpio_ir_recv rc_core fuse [last unloaded: btnxpuart(O)]\n[ 85.927297] CPU: 1 PID: 67 Comm: kworker/1:3 Tainted: G O 6.1.36+g937b1be4345a #1\n[ 85.936176] Hardware name: FSL i.MX8MM EVK board (DT)\n[ 85.936182] Workqueue: events 0xffffd4a61638f380\n[ 85.936198] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 85.952817] pc : 0xffffd4a61638f258\n[ 85.952823] lr : 0xffffd4a61638f258\n[ 85.952827] sp : ffff8000084fbd70\n[ 85.952829] x29: ffff8000084fbd70 x28: 0000000000000000 x27: 0000000000000000\n[ 85.963112] x26: ffffd4a69133f000 x25: ffff4bf1c8540990 x24: ffff4bf215b87305\n[ 85.963119] x23: ffff4bf215b87300 x22: ffff4bf1c85409d0 x21: ffff4bf1c8540970\n[ 85.977382] x20: 0000000000000000 x19: ffff4bf1c8540880 x18: 0000000000000000\n[ 85.977391] x17: 0000000000000000 x16: 0000000000000133 x15: 0000ffffe2217090\n[ 85.977399] x14: 0000000000000001 x13: 0000000000000133 x12: 0000000000000139\n[ 85.977407] x11: 0000000000000001 x10: 0000000000000a60 x9 : ffff8000084fbc50\n[ 85.977417] x8 : ffff4bf215b7d000 x7 : ffff4bf215b83b40 x6 : 00000000000003e8\n[ 85.977424] x5 : 00000000410fd030 x4 : 0000000000000000 x3 : 0000000000000000\n[ 85.977432] x2 : 0000000000000000 x1 : ffff4bf1c4265880 x0 : 0000000000000000\n[ 85.977443] Call trace:\n[ 85.977446] 0xffffd4a61638f258\n[ 85.977451] 0xffffd4a61638f3e8\n[ 85.977455] process_one_work+0x1d4/0x330\n[ 85.977464] worker_thread+0x6c/0x430\n[ 85.977471] kthread+0x108/0x10c\n[ 85.977476] ret_from_fork+0x10/0x20\n[ 85.977488] Code: bad PC value\n[ 85.977491] ---[ end trace 0000000000000000 ]---\n\nPreset since v6.9.11"
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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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The dangling `ps_work` is armed by a local action — driver unbind/module removal or bringing the HCI interface down — not by any received Bluetooth frame; an adjacent peer can influence the power-save state but cannot initiate the teardown that triggers the use-after-free.\nAC:L - Power save is enabled by default and the controller enters `PS_STATE_SLEEP` deterministically after 2 s idle, so the attacker simply waits, then triggers close/unload, and can repeat the load/unload or down/up cycle indefinitely; it controls both sides of the race.\nPR:L - On the embedded/Android-class systems where btnxpuart is deployed, an unprivileged local user can repeatedly cause the HCI device to be closed (Bluetooth toggle/rfkill via the platform BT service) while the chip is asleep, arming the work that then runs against freed `nxpdev`/`tty` memory.\nUI:N - The attacker performs the triggering action itself (interface down or driver unbind loop); no separate victim interaction is needed.\nS:U - Both the flaw and its impact are confined to the kernel's own security authority — no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The pending work item lives in freed devres memory and `ps_control()` dereferences a freed `hci_dev`/`serdev`/`tty`; controlling the reallocated object yields an arbitrary-pointer read primitive and, via the hijacked function pointer, full memory disclosure.\nI:H - `process_one_work()` calls `work->func` read from freed heap and `ps_control()` writes `psdata->ps_state` into freed memory, giving a heap-spray-controlled indirect call plus a write primitive — sufficient for control-flow hijack and privilege escalation.\nA:H - The unfixed bug reliably produces a kernel oops (instruction abort at freed module text) that panics the system during driver unload or interface teardown."
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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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"drivers/bluetooth/btnxpuart.c"
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],
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"versions": [
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{
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"version": "86d55f124b52de2ba0d066d89b766bcc0387fd72",
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"lessThan": "662a55986b88807da4d112d838c8aaa05810e938",
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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": "86d55f124b52de2ba0d066d89b766bcc0387fd72",
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"lessThan": "29a1d9971e38f92c84b363ff50379dd434ddfe1c",
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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": "86d55f124b52de2ba0d066d89b766bcc0387fd72",
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"lessThan": "35237475384ab3622f63c3c09bdf6af6dacfe9c3",
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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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"drivers/bluetooth/btnxpuart.c"
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],
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"versions": [
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{
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"version": "6.4",
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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": "6.4",
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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": "6.6.49",
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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": "6.10.8",
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"lessThanOrEqual": "6.10.*",
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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": "6.11",
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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": "6.4",
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"versionEndExcluding": "6.6.49"
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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": "6.4",
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"versionEndExcluding": "6.10.8"
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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": "6.4",
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"versionEndExcluding": "6.11"
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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/662a55986b88807da4d112d838c8aaa05810e938"
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},
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{
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"url": "https://git.kernel.org/stable/c/29a1d9971e38f92c84b363ff50379dd434ddfe1c"
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},
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{
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"url": "https://git.kernel.org/stable/c/35237475384ab3622f63c3c09bdf6af6dacfe9c3"
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}
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],
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"title": "Bluetooth: btnxpuart: Fix random crash seen while removing driver",
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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": "2024-09-29T15:09:48.767576Z",
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"id": "CVE-2024-46680",
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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": "2024-09-29T15:10:03.450Z"
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}
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}
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]
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}
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} |