CVE-2026-43061In 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 w…
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-667
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 5.4.291 before 5.5; from 5.10.235 before 5.10.253; from 5.15.179 before 5.15.203; from 6.1.129 before 6.1.167; from 6.6.79 before 6.6.130; from 6.12.16 before 6.12.78; from 6.13.4 before 6.14; from 6.14.1 before 6.18.20; and 14 more ranges | NVD |
References
- https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1patch
- https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41patch
- https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762dpatch
- https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70dpatch
- https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7patch
- https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275patch
- https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93patch
- https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccfpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.