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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-43061

serial: 8250: Fix TX deadlock when using DMA

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 7c47e637dfadfbc691dd297b91d81ef939ca2080 to < 8190f9ab6ad90cb97652adbebd238b874a4ef70daffected
  • bf3f395b9c37956eca866c9e1679769ed7dcce68 to < 79a19bd936bb35f56ef0ccab1b3b59ebce8c762daffected
  • d470522c597b73e63cca04f3012aec28185113b7 to < f76d91271bcacbd759a2e4ee3ea61faa6a727ccfaffected
  • 5e00346deb7bf40a4cf70e3716ac8e9a2409eb55 to < d2719a0a9c3439abf67843a5504b7afccd9ded93affected
  • c8a52c772c7c6de72257a435bcad03d3bb914a70 to < 2a72403b985aea6b4aac3171830492f9a387f9e1affected
  • 9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583 to < 5f6b17562f03fc65c7d3474ef8f1959b19d1ca41affected
  • 9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583 to < b5ad887339503103d0fbe9827b16ad287597c275affected
  • 9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583 to < a424a34b8faddf97b5af41689087e7a230f79ba7affected
  • bbec5998d7bd349730f59c959a8b00cfff816e34affected
  • 59f751db7f392fa7a58cbd972205982f7f4f5854affected
  • 5.10.235 to < 5.10.253affected
  • 5.15.179 to < 5.15.203affected
  • 6.1.129 to < 6.1.167affected
  • 6.6.79 to < 6.6.130affected
  • 6.12.16 to < 6.12.78affected
  • 5.4.291 to < 5.5affected
  • 6.13.4 to < 6.14affected

Linux Linux

Default version status: affected

  • 6.14affected
  • 0 to < 6.14unaffected
  • 5.10.253 to ≤ 5.10.*unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.1.167 to ≤ 6.1.*unaffected
  • 6.6.130 to ≤ 6.6.*unaffected
  • 6.12.78 to ≤ 6.12.*unaffected
  • 6.18.20 to ≤ 6.18.*unaffected
  • 6.19.10 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References