CVE-2023-53094

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  2. Vulnerabilities (CVE)
  3. CVE-2023-53094

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n 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
Link Resource
https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702 Patch
https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9 Patch
https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a Patch
https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38 Patch
https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*
History

12 Nov 2025, 21:00

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702 - () https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702 - Patch
References () https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9 - () https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9 - Patch
References () https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a - () https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a - Patch
References () https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38 - () https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38 - Patch
References () https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36 - () https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36 - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-362
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7
First Time Linux linux Kernel
Linux

05 May 2025, 20:54

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: serial: fsl_lpuart: fix race on RX DMA shutting De vez en cuando, la finalización de DMA puede llegar en medio del shutting de DMA: : : lpuart32_shutdown() lpuart_dma_shutdown() del_timer_sync() lpuart_dma_rx_complete() lpuart_copy_rx_to_tty() mod_timer() lpuart_dma_rx_free() Cuando el temporizador se activa un poco más tarde, sport-&gt;dma_rx_desc es NULL: No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Rastreo de llamadas: 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 ... Para solucionar esto, incorpore del_timer_sync() en lpuart_dma_rx_free() después de dmaengine_terminate_sync() para asegurarse de que el temporizador no se reinicie en lpuart_copy_rx_to_tty() &lt;= lpuart_dma_rx_complete().

02 May 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-02 16:15

Updated : 2025-11-12 21:00

NVD link : CVE-2023-53094

Mitre link : CVE-2023-53094

CVE.ORG link : CVE-2023-53094

JSON object : View

Products Affected

linux

CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')