Executive Summary



This vulnerability is currently undergoing analysis and not all information is available. Please check back soon to view the completed vulnerability summary
Informations
Name CVE-2023-53094 First vendor Publication 2025-05-02
Vendor Cve Last vendor Modification 2025-05-02

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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:

: : 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().

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-53094

Sources (Detail)

https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702
https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9
https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a
https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38
https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36
Source Url

Alert History

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0
Date Informations
2025-05-27 02:29:52
  • First insertion