cbcvebase.
CVE-2022-50375
published 2025-09-18

CVE-2022-50375: In the Linux kernel, the following vulnerability has been resolved: tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdown…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.15%
4.3th percentile
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

Affected

17 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.3-1 (bookworm)linux 6.0.3-1 (bookworm)
linuxlinux——
linuxlinux>= 6250cc30c4c4e25393ba247f71bdc04b6af3191b < 29b897ac7b990882c74bd08605692214e7e58b8329b897ac7b990882c74bd08605692214e7e58b83
linuxlinux>= 6250cc30c4c4e25393ba247f71bdc04b6af3191b < 9a56ade124d4891a31ab1300c57665f07f5b24d59a56ade124d4891a31ab1300c57665f07f5b24d5
linuxlinux>= 6250cc30c4c4e25393ba247f71bdc04b6af3191b < c4293def8860fd587a84400ccba5b49cec56e2c3c4293def8860fd587a84400ccba5b49cec56e2c3
linuxlinux>= 6250cc30c4c4e25393ba247f71bdc04b6af3191b < d554c14eb73ee91d76fc9aece4616f0b687c295dd554c14eb73ee91d76fc9aece4616f0b687c295d
linuxlinux>= 6250cc30c4c4e25393ba247f71bdc04b6af3191b < 3953e7f261e2f4d9c35f0c025df9f166f46aa6263953e7f261e2f4d9c35f0c025df9f166f46aa626
linuxlinux>= 6250cc30c4c4e25393ba247f71bdc04b6af3191b < 316ae95c175a7d770d1bfe4c011192712f57aa4a316ae95c175a7d770d1bfe4c011192712f57aa4a
linuxlinux_kernel>= 0 < 5.10.158-15.10.158-1
linuxlinux_kernel>= 0 < 6.0.3-16.0.3-1
linuxlinux_kernel>= 0 < 6.0.3-16.0.3-1
linuxlinux_kernel>= 0 < 6.0.3-16.0.3-1
linuxlinux_kernel>= 4.9 < 5.4.2205.4.220
linuxlinux_kernel>= 5.11 < 5.15.755.15.75
linuxlinux_kernel>= 5.16 < 5.19.175.19.17
linuxlinux_kernel>= 5.5 < 5.10.1505.10.150
linuxlinux_kernel>= 6.0 < 6.0.36.0.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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