CVE-2026-43061

In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Fix TX deadlock when using DMA `dmaengine_terminate_async` does not guarantee that the `__dma_tx_complete` callback will run. The callback is currently the only place where `dma->tx_running` gets cleared. If the transaction is canceled and the callback never runs, then `dma->tx_running` will never get cleared and we will never schedule new TX DMA transactions again. This change makes it so we clear `dma->tx_running` after we terminate the DMA transaction. This is "safe" because `serial8250_tx_dma_flush` is holding the UART port lock. The first thing the callback does is also grab the UART port lock, so access to `dma->tx_running` is serialized.
Configurations

Configuration 1 (hide)

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History

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Information

Published : 2026-05-05 16:16

Updated : 2026-06-17 10:48


NVD link : CVE-2026-43061

Mitre link : CVE-2026-43061

CVE.ORG link : CVE-2026-43061


JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-667

Improper Locking