{"api_version":"1","generated_at":"2026-05-13T03:32:07+00:00","cve":"CVE-2026-43061","urls":{"html":"https://cve.report/CVE-2026-43061","api":"https://cve.report/api/cve/CVE-2026-43061.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43061","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43061"},"summary":{"title":"serial: 8250: Fix TX deadlock when using DMA","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix TX deadlock when using DMA\n\n`dmaengine_terminate_async` does not guarantee that the\n`__dma_tx_complete` callback will run. The callback is currently the\nonly place where `dma->tx_running` gets cleared. If the transaction is\ncanceled and the callback never runs, then `dma->tx_running` will never\nget cleared and we will never schedule new TX DMA transactions again.\n\nThis change makes it so we clear `dma->tx_running` after we terminate\nthe DMA transaction. This is \"safe\" because `serial8250_tx_dma_flush`\nis holding the UART port lock. The first thing the callback does is also\ngrab the UART port lock, so access to `dma->tx_running` is serialized.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-05 16:16:15","updated_at":"2026-05-06 13:08:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762d","name":"https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275","name":"https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7","name":"https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93","name":"https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1","name":"https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d","name":"https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf","name":"https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41","name":"https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43061","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43061","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7c47e637dfadfbc691dd297b91d81ef939ca2080 8190f9ab6ad90cb97652adbebd238b874a4ef70d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf3f395b9c37956eca866c9e1679769ed7dcce68 79a19bd936bb35f56ef0ccab1b3b59ebce8c762d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d470522c597b73e63cca04f3012aec28185113b7 f76d91271bcacbd759a2e4ee3ea61faa6a727ccf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e00346deb7bf40a4cf70e3716ac8e9a2409eb55 d2719a0a9c3439abf67843a5504b7afccd9ded93 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix TX deadlock when using DMA\n\n`dmaengine_terminate_async` does not guarantee that the\n`__dma_tx_complete` callback will run. The callback is currently the\nonly place where `dma->tx_running` gets cleared. If the transaction is\ncanceled and the callback never runs, then `dma->tx_running` will never\nget cleared and we will never schedule new TX DMA transactions again.\n\nThis change makes it so we clear `dma->tx_running` after we terminate\nthe DMA transaction. This is \"safe\" because `serial8250_tx_dma_flush`\nis holding the UART port lock. The first thing the callback does is also\ngrab the UART port lock, so access to `dma->tx_running` is serialized."}],"providerMetadata":{"dateUpdated":"2026-05-05T15:17:27.079Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d"},{"url":"https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762d"},{"url":"https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf"},{"url":"https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93"},{"url":"https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1"},{"url":"https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41"},{"url":"https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275"},{"url":"https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7"}],"title":"serial: 8250: Fix TX deadlock when using DMA","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43061","datePublished":"2026-05-05T15:17:27.079Z","dateReserved":"2026-05-01T14:12:55.981Z","dateUpdated":"2026-05-05T15:17:27.079Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-05 16:16:15","lastModifiedDate":"2026-05-06 13:08:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43061","Ordinal":"1","Title":"serial: 8250: Fix TX deadlock when using DMA","CVE":"CVE-2026-43061","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43061","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix TX deadlock when using DMA\n\n`dmaengine_terminate_async` does not guarantee that the\n`__dma_tx_complete` callback will run. The callback is currently the\nonly place where `dma->tx_running` gets cleared. If the transaction is\ncanceled and the callback never runs, then `dma->tx_running` will never\nget cleared and we will never schedule new TX DMA transactions again.\n\nThis change makes it so we clear `dma->tx_running` after we terminate\nthe DMA transaction. This is \"safe\" because `serial8250_tx_dma_flush`\nis holding the UART port lock. The first thing the callback does is also\ngrab the UART port lock, so access to `dma->tx_running` is serialized.","Type":"Description","Title":"serial: 8250: Fix TX deadlock when using DMA"}]}}}