5.5

CVE-2026-43061

serial: 8250: Fix TX deadlock when using DMA

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.4.291 < 5.5
Linux ≫ Linux Kernel Version >= 5.10.235 < 5.10.253
Linux ≫ Linux Kernel Version >= 5.15.179 < 5.15.203
Linux ≫ Linux Kernel Version >= 6.1.129 < 6.1.167
Linux ≫ Linux Kernel Version >= 6.6.79 < 6.6.130
Linux ≫ Linux Kernel Version >= 6.12.16 < 6.12.78
Linux ≫ Linux Kernel Version >= 6.13.4 < 6.14
Linux ≫ Linux Kernel Version >= 6.14.1 < 6.18.20
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.10
Linux ≫ Linux Kernel Version6.14 Update-
Linux ≫ Linux Kernel Version6.14 Updaterc3
Linux ≫ Linux Kernel Version6.14 Updaterc4
Linux ≫ Linux Kernel Version6.14 Updaterc5
Linux ≫ Linux Kernel Version6.14 Updaterc6
Linux ≫ Linux Kernel Version6.14 Updaterc7
Linux ≫ Linux Kernel Version7.0 Updaterc1
Linux ≫ Linux Kernel Version7.0 Updaterc2
Linux ≫ Linux Kernel Version7.0 Updaterc3
Linux ≫ Linux Kernel Version7.0 Updaterc4
Linux ≫ Linux Kernel Version7.0 Updaterc5
Linux ≫ Linux Kernel Version7.0 Updaterc6
Linux ≫ Linux Kernel Version7.0 Updaterc7
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.09% 0.006
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1
Patch
https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41
Patch
https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762d
Patch
https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d
Patch
https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7
Patch
https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275
Patch
https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93
Patch
https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf
Patch