CVE - CVE-2023-52456

CVE-ID
CVE-2023-52456	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: serial: imx: fix tx statemachine deadlock When using the serial port as RS485 port, the tx statemachine is used to control the RTS pin to drive the RS485 transceiver TX_EN pin. When the TTY port is closed in the middle of a transmission (for instance during userland application crash), imx_uart_shutdown disables the interface and disables the Transmission Complete interrupt. afer that, imx_uart_stop_tx bails on an incomplete transmission, to be retriggered by the TC interrupt. This interrupt is disabled and therefore the tx statemachine never transitions out of SEND. The statemachine is in deadlock now, and the TX_EN remains low, making the interface useless. imx_uart_stop_tx now checks for incomplete transmission AND whether TC interrupts are enabled before bailing to be retriggered. This makes sure the state machine handling is reached, and is properly set to WAIT_AFTER_SEND.
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/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 URL:https://git.kernel.org/stable/c/63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 MISC:https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda URL:https://git.kernel.org/stable/c/6e04a9d30509fb53ba6df5d655ed61d607a7cfda MISC:https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181 URL:https://git.kernel.org/stable/c/763cd68746317b5d746dc2649a3295c1efb41181 MISC:https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 URL:https://git.kernel.org/stable/c/78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 MISC:https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b URL:https://git.kernel.org/stable/c/9a662d06c22ddfa371958c2071dc350436be802b MISC:https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19 URL:https://git.kernel.org/stable/c/ff168d4fdb0e1ba35fb413a749b3d6cce918ec19
Assigning CNA
kernel.org
Date Record Created
20240220	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 (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)