CVE-2022-50375 (GCVE-0-2022-50375)
Vulnerability from cvelistv5 – Published: 2025-09-18 13:32 – Updated: 2026-05-11 19:18
VLAI
EPSS
VEX
Title
tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown
Summary
In the Linux kernel, the following vulnerability has been resolved:
tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown
lpuart_dma_shutdown tears down lpuart dma, but lpuart_flush_buffer can
still occur which in turn tries to access dma apis if lpuart_dma_tx_use
flag is true. At this point since dma is torn down, these dma apis can
abort. Set lpuart_dma_tx_use and the corresponding rx flag
lpuart_dma_rx_use to false in lpuart_dma_shutdown so that dmas are not
accessed after they are relinquished.
Otherwise, when try to kill btattach, kernel may panic. This patch may
fix this issue.
root@imx8ulpevk:~# btattach -B /dev/ttyLP2 -S 115200
^C[ 90.182296] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP
[ 90.189806] Modules linked in: moal(O) mlan(O)
[ 90.194258] CPU: 0 PID: 503 Comm: btattach Tainted: G O 5.15.32-06136-g34eecdf2f9e4 #37
[ 90.203554] Hardware name: NXP i.MX8ULP 9X9 EVK (DT)
[ 90.208513] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 90.215470] pc : fsl_edma3_disable_request+0x8/0x60
[ 90.220358] lr : fsl_edma3_terminate_all+0x34/0x20c
[ 90.225237] sp : ffff800013f0bac0
[ 90.228548] x29: ffff800013f0bac0 x28: 0000000000000001 x27: ffff000008404800
[ 90.235681] x26: ffff000008404960 x25: ffff000008404a08 x24: ffff000008404a00
[ 90.242813] x23: ffff000008404a60 x22: 0000000000000002 x21: 0000000000000000
[ 90.249946] x20: ffff800013f0baf8 x19: ffff00000559c800 x18: 0000000000000000
[ 90.257078] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[ 90.264211] x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000040
[ 90.271344] x11: ffff00000600c248 x10: ffff800013f0bb10 x9 : ffff000057bcb090
[ 90.278477] x8 : fffffc0000241a08 x7 : ffff00000534ee00 x6 : ffff000008404804
[ 90.285609] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff0000055b3480
[ 90.292742] x2 : ffff8000135c0000 x1 : ffff00000534ee00 x0 : ffff00000559c800
[ 90.299876] Call trace:
[ 90.302321] fsl_edma3_disable_request+0x8/0x60
[ 90.306851] lpuart_flush_buffer+0x40/0x160
[ 90.311037] uart_flush_buffer+0x88/0x120
[ 90.315050] tty_driver_flush_buffer+0x20/0x30
[ 90.319496] hci_uart_flush+0x44/0x90
[ 90.323162] +0x34/0x12c
[ 90.327253] tty_ldisc_close+0x38/0x70
[ 90.331005] tty_ldisc_release+0xa8/0x190
[ 90.335018] tty_release_struct+0x24/0x8c
[ 90.339022] tty_release+0x3ec/0x4c0
[ 90.342593] __fput+0x70/0x234
[ 90.345652] ____fput+0x14/0x20
[ 90.348790] task_work_run+0x84/0x17c
[ 90.352455] do_exit+0x310/0x96c
[ 90.355688] do_group_exit+0x3c/0xa0
[ 90.359259] __arm64_sys_exit_group+0x1c/0x20
[ 90.363609] invoke_syscall+0x48/0x114
[ 90.367362] el0_svc_common.constprop.0+0xd4/0xfc
[ 90.372068] do_el0_svc+0x2c/0x94
[ 90.375379] el0_svc+0x28/0x80
[ 90.378438] el0t_64_sync_handler+0xa8/0x130
[ 90.382711] el0t_64_sync+0x1a0/0x1a4
[ 90.386376] Code: 17ffffda d503201f d503233f f9409802 (b9400041)
[ 90.392467] ---[ end trace 2f60524b4a43f1f6 ]---
[ 90.397073] note: btattach[503] exited with preempt_count 1
[ 90.402636] Fixing recursive fault but reboot is needed!
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:46 UTC
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
6250cc30c4c4e25393ba247f71bdc04b6af3191b , < 29b897ac7b990882c74bd08605692214e7e58b83
(git)
Affected: 6250cc30c4c4e25393ba247f71bdc04b6af3191b , < 9a56ade124d4891a31ab1300c57665f07f5b24d5 (git) Affected: 6250cc30c4c4e25393ba247f71bdc04b6af3191b , < c4293def8860fd587a84400ccba5b49cec56e2c3 (git) Affected: 6250cc30c4c4e25393ba247f71bdc04b6af3191b , < d554c14eb73ee91d76fc9aece4616f0b687c295d (git) Affected: 6250cc30c4c4e25393ba247f71bdc04b6af3191b , < 3953e7f261e2f4d9c35f0c025df9f166f46aa626 (git) Affected: 6250cc30c4c4e25393ba247f71bdc04b6af3191b , < 316ae95c175a7d770d1bfe4c011192712f57aa4a (git) |
guessed | |
| Linux | Linux |
Affected:
4.9
Unaffected: 0 , < 4.9 (semver) Unaffected: 5.4.220 , ≤ 5.4.* (semver) Unaffected: 5.10.150 , ≤ 5.10.* (semver) Unaffected: 5.15.75 , ≤ 5.15.* (semver) Unaffected: 5.19.17 , ≤ 5.19.* (semver) Unaffected: 6.0.3 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown\n\nlpuart_dma_shutdown tears down lpuart dma, but lpuart_flush_buffer can\nstill occur which in turn tries to access dma apis if lpuart_dma_tx_use\nflag is true. At this point since dma is torn down, these dma apis can\nabort. Set lpuart_dma_tx_use and the corresponding rx flag\nlpuart_dma_rx_use to false in lpuart_dma_shutdown so that dmas are not\naccessed after they are relinquished.\n\nOtherwise, when try to kill btattach, kernel may panic. This patch may\nfix this issue.\nroot@imx8ulpevk:~# btattach -B /dev/ttyLP2 -S 115200\n^C[ 90.182296] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP\n[ 90.189806] Modules linked in: moal(O) mlan(O)\n[ 90.194258] CPU: 0 PID: 503 Comm: btattach Tainted: G O 5.15.32-06136-g34eecdf2f9e4 #37\n[ 90.203554] Hardware name: NXP i.MX8ULP 9X9 EVK (DT)\n[ 90.208513] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 90.215470] pc : fsl_edma3_disable_request+0x8/0x60\n[ 90.220358] lr : fsl_edma3_terminate_all+0x34/0x20c\n[ 90.225237] sp : ffff800013f0bac0\n[ 90.228548] x29: ffff800013f0bac0 x28: 0000000000000001 x27: ffff000008404800\n[ 90.235681] x26: ffff000008404960 x25: ffff000008404a08 x24: ffff000008404a00\n[ 90.242813] x23: ffff000008404a60 x22: 0000000000000002 x21: 0000000000000000\n[ 90.249946] x20: ffff800013f0baf8 x19: ffff00000559c800 x18: 0000000000000000\n[ 90.257078] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n[ 90.264211] x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000040\n[ 90.271344] x11: ffff00000600c248 x10: ffff800013f0bb10 x9 : ffff000057bcb090\n[ 90.278477] x8 : fffffc0000241a08 x7 : ffff00000534ee00 x6 : ffff000008404804\n[ 90.285609] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff0000055b3480\n[ 90.292742] x2 : ffff8000135c0000 x1 : ffff00000534ee00 x0 : ffff00000559c800\n[ 90.299876] Call trace:\n[ 90.302321] fsl_edma3_disable_request+0x8/0x60\n[ 90.306851] lpuart_flush_buffer+0x40/0x160\n[ 90.311037] uart_flush_buffer+0x88/0x120\n[ 90.315050] tty_driver_flush_buffer+0x20/0x30\n[ 90.319496] hci_uart_flush+0x44/0x90\n[ 90.323162] +0x34/0x12c\n[ 90.327253] tty_ldisc_close+0x38/0x70\n[ 90.331005] tty_ldisc_release+0xa8/0x190\n[ 90.335018] tty_release_struct+0x24/0x8c\n[ 90.339022] tty_release+0x3ec/0x4c0\n[ 90.342593] __fput+0x70/0x234\n[ 90.345652] ____fput+0x14/0x20\n[ 90.348790] task_work_run+0x84/0x17c\n[ 90.352455] do_exit+0x310/0x96c\n[ 90.355688] do_group_exit+0x3c/0xa0\n[ 90.359259] __arm64_sys_exit_group+0x1c/0x20\n[ 90.363609] invoke_syscall+0x48/0x114\n[ 90.367362] el0_svc_common.constprop.0+0xd4/0xfc\n[ 90.372068] do_el0_svc+0x2c/0x94\n[ 90.375379] el0_svc+0x28/0x80\n[ 90.378438] el0t_64_sync_handler+0xa8/0x130\n[ 90.382711] el0t_64_sync+0x1a0/0x1a4\n[ 90.386376] Code: 17ffffda d503201f d503233f f9409802 (b9400041)\n[ 90.392467] ---[ end trace 2f60524b4a43f1f6 ]---\n[ 90.397073] note: btattach[503] exited with preempt_count 1\n[ 90.402636] Fixing recursive fault but reboot is needed!"
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown\n\nlpuart_dma_shutdown tears down lpuart dma, but lpuart_flush_buffer can\nstill occur which in turn tries to access dma apis if lpuart_dma_tx_use\nflag is true. At this point since dma is torn down, these dma apis can\nabort. Set lpuart_dma_tx_use and the corresponding rx flag\nlpuart_dma_rx_use to false in lpuart_dma_shutdown so that dmas are not\naccessed after they are relinquished.\n\nOtherwise, when try to kill btattach, kernel may panic. This patch may\nfix this issue.\nroot@imx8ulpevk:~# btattach -B /dev/ttyLP2 -S 115200\n^C[ 90.182296] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP\n[ 90.189806] Modules linked in: moal(O) mlan(O)\n[ 90.194258] CPU: 0 PID: 503 Comm: btattach Tainted: G O 5.15.32-06136-g34eecdf2f9e4 #37\n[ 90.203554] Hardware name: NXP i.MX8ULP 9X9 EVK (DT)\n[ 90.208513] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 90.215470] pc : fsl_edma3_disable_request+0x8/0x60\n[ 90.220358] lr : fsl_edma3_terminate_all+0x34/0x20c\n[ 90.225237] sp : ffff800013f0bac0\n[ 90.228548] x29: ffff800013f0bac0 x28: 0000000000000001 x27: ffff000008404800\n[ 90.235681] x26: ffff000008404960 x25: ffff000008404a08 x24: ffff000008404a00\n[ 90.242813] x23: ffff000008404a60 x22: 0000000000000002 x21: 0000000000000000\n[ 90.249946] x20: ffff800013f0baf8 x19: ffff00000559c800 x18: 0000000000000000\n[ 90.257078] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n[ 90.264211] x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000040\n[ 90.271344] x11: ffff00000600c248 x10: ffff800013f0bb10 x9 : ffff000057bcb090\n[ 90.278477] x8 : fffffc0000241a08 x7 : ffff00000534ee00 x6 : ffff000008404804\n[ 90.285609] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff0000055b3480\n[ 90.292742] x2 : ffff8000135c0000 x1 : ffff00000534ee00 x0 : ffff00000559c800\n[ 90.299876] Call trace:\n[ 90.302321] fsl_edma3_disable_request+0x8/0x60\n[ 90.306851] lpuart_flush_buffer+0x40/0x160\n[ 90.311037] uart_flush_buffer+0x88/0x120\n[ 90.315050] tty_driver_flush_buffer+0x20/0x30\n[ 90.319496] hci_uart_flush+0x44/0x90\n[ 90.323162] +0x34/0x12c\n[ 90.327253] tty_ldisc_close+0x38/0x70\n[ 90.331005] tty_ldisc_release+0xa8/0x190\n[ 90.335018] tty_release_struct+0x24/0x8c\n[ 90.339022] tty_release+0x3ec/0x4c0\n[ 90.342593] __fput+0x70/0x234\n[ 90.345652] ____fput+0x14/0x20\n[ 90.348790] task_work_run+0x84/0x17c\n[ 90.352455] do_exit+0x310/0x96c\n[ 90.355688] do_group_exit+0x3c/0xa0\n[ 90.359259] __arm64_sys_exit_group+0x1c/0x20\n[ 90.363609] invoke_syscall+0x48/0x114\n[ 90.367362] el0_svc_common.constprop.0+0xd4/0xfc\n[ 90.372068] do_el0_svc+0x2c/0x94\n[ 90.375379] el0_svc+0x28/0x80\n[ 90.378438] el0t_64_sync_handler+0xa8/0x130\n[ 90.382711] el0t_64_sync+0x1a0/0x1a4\n[ 90.386376] Code: 17ffffda d503201f d503233f f9409802 (b9400041)\n[ 90.392467] ---[ end trace 2f60524b4a43f1f6 ]---\n[ 90.397073] note: btattach[503] exited with preempt_count 1\n[ 90.402636] Fixing recursive fault but reboot is needed!"
}
],
"id": "CVE-2022-50375",
"lastModified": "2026-06-17T05:23:22.370",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2022-50375",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:46:25.103854Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-18T14:15:36.110",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/29b897ac7b990882c74bd08605692214e7e58b83"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/316ae95c175a7d770d1bfe4c011192712f57aa4a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/3953e7f261e2f4d9c35f0c025df9f166f46aa626"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/9a56ade124d4891a31ab1300c57665f07f5b24d5"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/c4293def8860fd587a84400ccba5b49cec56e2c3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d554c14eb73ee91d76fc9aece4616f0b687c295d"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-29T21:49:00+00:00",
"cve": "CVE-2022-50375",
"id": "CVE-2022-50375",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:known_affected": "108",
"product_status:known_not_affected": "166",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50375.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-50375",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:46:25.103854Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-noinfo Not enough information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T18:46:20.798Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/fsl_lpuart.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "29b897ac7b990882c74bd08605692214e7e58b83",
"status": "affected",
"version": "6250cc30c4c4e25393ba247f71bdc04b6af3191b",
"versionType": "git"
},
{
"lessThan": "9a56ade124d4891a31ab1300c57665f07f5b24d5",
"status": "affected",
"version": "6250cc30c4c4e25393ba247f71bdc04b6af3191b",
"versionType": "git"
},
{
"lessThan": "c4293def8860fd587a84400ccba5b49cec56e2c3",
"status": "affected",
"version": "6250cc30c4c4e25393ba247f71bdc04b6af3191b",
"versionType": "git"
},
{
"lessThan": "d554c14eb73ee91d76fc9aece4616f0b687c295d",
"status": "affected",
"version": "6250cc30c4c4e25393ba247f71bdc04b6af3191b",
"versionType": "git"
},
{
"lessThan": "3953e7f261e2f4d9c35f0c025df9f166f46aa626",
"status": "affected",
"version": "6250cc30c4c4e25393ba247f71bdc04b6af3191b",
"versionType": "git"
},
{
"lessThan": "316ae95c175a7d770d1bfe4c011192712f57aa4a",
"status": "affected",
"version": "6250cc30c4c4e25393ba247f71bdc04b6af3191b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/fsl_lpuart.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"lessThan": "4.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.220",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.150",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.75",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"version": "5.19.17",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.220",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.150",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.75",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.17",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.3",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1",
"versionStartIncluding": "4.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown\n\nlpuart_dma_shutdown tears down lpuart dma, but lpuart_flush_buffer can\nstill occur which in turn tries to access dma apis if lpuart_dma_tx_use\nflag is true. At this point since dma is torn down, these dma apis can\nabort. Set lpuart_dma_tx_use and the corresponding rx flag\nlpuart_dma_rx_use to false in lpuart_dma_shutdown so that dmas are not\naccessed after they are relinquished.\n\nOtherwise, when try to kill btattach, kernel may panic. This patch may\nfix this issue.\nroot@imx8ulpevk:~# btattach -B /dev/ttyLP2 -S 115200\n^C[ 90.182296] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP\n[ 90.189806] Modules linked in: moal(O) mlan(O)\n[ 90.194258] CPU: 0 PID: 503 Comm: btattach Tainted: G O 5.15.32-06136-g34eecdf2f9e4 #37\n[ 90.203554] Hardware name: NXP i.MX8ULP 9X9 EVK (DT)\n[ 90.208513] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 90.215470] pc : fsl_edma3_disable_request+0x8/0x60\n[ 90.220358] lr : fsl_edma3_terminate_all+0x34/0x20c\n[ 90.225237] sp : ffff800013f0bac0\n[ 90.228548] x29: ffff800013f0bac0 x28: 0000000000000001 x27: ffff000008404800\n[ 90.235681] x26: ffff000008404960 x25: ffff000008404a08 x24: ffff000008404a00\n[ 90.242813] x23: ffff000008404a60 x22: 0000000000000002 x21: 0000000000000000\n[ 90.249946] x20: ffff800013f0baf8 x19: ffff00000559c800 x18: 0000000000000000\n[ 90.257078] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n[ 90.264211] x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000040\n[ 90.271344] x11: ffff00000600c248 x10: ffff800013f0bb10 x9 : ffff000057bcb090\n[ 90.278477] x8 : fffffc0000241a08 x7 : ffff00000534ee00 x6 : ffff000008404804\n[ 90.285609] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff0000055b3480\n[ 90.292742] x2 : ffff8000135c0000 x1 : ffff00000534ee00 x0 : ffff00000559c800\n[ 90.299876] Call trace:\n[ 90.302321] fsl_edma3_disable_request+0x8/0x60\n[ 90.306851] lpuart_flush_buffer+0x40/0x160\n[ 90.311037] uart_flush_buffer+0x88/0x120\n[ 90.315050] tty_driver_flush_buffer+0x20/0x30\n[ 90.319496] hci_uart_flush+0x44/0x90\n[ 90.323162] +0x34/0x12c\n[ 90.327253] tty_ldisc_close+0x38/0x70\n[ 90.331005] tty_ldisc_release+0xa8/0x190\n[ 90.335018] tty_release_struct+0x24/0x8c\n[ 90.339022] tty_release+0x3ec/0x4c0\n[ 90.342593] __fput+0x70/0x234\n[ 90.345652] ____fput+0x14/0x20\n[ 90.348790] task_work_run+0x84/0x17c\n[ 90.352455] do_exit+0x310/0x96c\n[ 90.355688] do_group_exit+0x3c/0xa0\n[ 90.359259] __arm64_sys_exit_group+0x1c/0x20\n[ 90.363609] invoke_syscall+0x48/0x114\n[ 90.367362] el0_svc_common.constprop.0+0xd4/0xfc\n[ 90.372068] do_el0_svc+0x2c/0x94\n[ 90.375379] el0_svc+0x28/0x80\n[ 90.378438] el0t_64_sync_handler+0xa8/0x130\n[ 90.382711] el0t_64_sync+0x1a0/0x1a4\n[ 90.386376] Code: 17ffffda d503201f d503233f f9409802 (b9400041)\n[ 90.392467] ---[ end trace 2f60524b4a43f1f6 ]---\n[ 90.397073] note: btattach[503] exited with preempt_count 1\n[ 90.402636] Fixing recursive fault but reboot is needed!"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:18:20.373Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/29b897ac7b990882c74bd08605692214e7e58b83"
},
{
"url": "https://git.kernel.org/stable/c/9a56ade124d4891a31ab1300c57665f07f5b24d5"
},
{
"url": "https://git.kernel.org/stable/c/c4293def8860fd587a84400ccba5b49cec56e2c3"
},
{
"url": "https://git.kernel.org/stable/c/d554c14eb73ee91d76fc9aece4616f0b687c295d"
},
{
"url": "https://git.kernel.org/stable/c/3953e7f261e2f4d9c35f0c025df9f166f46aa626"
},
{
"url": "https://git.kernel.org/stable/c/316ae95c175a7d770d1bfe4c011192712f57aa4a"
}
],
"title": "tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50375",
"datePublished": "2025-09-18T13:32:58.361Z",
"dateReserved": "2025-09-17T14:53:06.996Z",
"dateUpdated": "2026-05-11T19:18:20.373Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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