IT

Tracker / CVE-2026-43061

CVE-2026-43061

Medium 5.5

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.

Affected products and versions

linux linux_kernel
linux linux_kernel · 5.10.235 → 5.10.253
linux linux_kernel · 5.15.179 → 5.15.203
linux linux_kernel · 5.4.291 → 5.5
linux linux_kernel · 6.1.129 → 6.1.167
linux linux_kernel · 6.12.16 → 6.12.78
linux linux_kernel · 6.13.4 → 6.14
linux linux_kernel · 6.14.1 → 6.18.20
linux linux_kernel · 6.19 → 6.19.10
linux linux_kernel · 6.6.79 → 6.6.130

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References