CVE - CVE-2023-53094

CVE-ID
CVE-2023-53094	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: tty: serial: fsl_lpuart: fix race on RX DMA shutdown From time to time DMA completion can come in the middle of DMA shutdown: <process ctx>: <IRQ>: lpuart32_shutdown() lpuart_dma_shutdown() del_timer_sync() lpuart_dma_rx_complete() lpuart_copy_rx_to_tty() mod_timer() lpuart_dma_rx_free() When the timer fires a bit later, sport->dma_rx_desc is NULL: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Call trace: lpuart_copy_rx_to_tty lpuart_timer_func call_timer_fn __run_timers.part.0 run_timer_softirq __do_softirq __irq_exit_rcu irq_exit handle_domain_irq gic_handle_irq call_on_irq_stack do_interrupt_handler ... To fix this fold del_timer_sync() into lpuart_dma_rx_free() after dmaengine_terminate_sync() to make sure timer will not be re-started in lpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete().
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702 URL:https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702 MISC:https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9 URL:https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9 MISC:https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a URL:https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a MISC:https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38 URL:https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38 MISC:https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36 URL:https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36
Assigning CNA
kernel.org
Date Record Created
20250502	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250502)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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