{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43061", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.981Z", "datePublished": "2026-05-05T15:17:27.079Z", "dateUpdated": "2026-05-05T15:17:27.079Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-05T15:17:27.079Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/8250/8250_dma.c"], "versions": [{"version": "7c47e637dfadfbc691dd297b91d81ef939ca2080", "lessThan": "8190f9ab6ad90cb97652adbebd238b874a4ef70d", "status": "affected", "versionType": "git"}, {"version": "bf3f395b9c37956eca866c9e1679769ed7dcce68", "lessThan": "79a19bd936bb35f56ef0ccab1b3b59ebce8c762d", "status": "affected", "versionType": "git"}, {"version": "d470522c597b73e63cca04f3012aec28185113b7", "lessThan": "f76d91271bcacbd759a2e4ee3ea61faa6a727ccf", "status": "affected", "versionType": "git"}, {"version": "5e00346deb7bf40a4cf70e3716ac8e9a2409eb55", "lessThan": "d2719a0a9c3439abf67843a5504b7afccd9ded93", "status": "affected", "versionType": "git"}, {"version": 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["drivers/tty/serial/8250/8250_dma.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.235", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.179", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.129", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.79", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.16", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", 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"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"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-43061", "lastModified": "2026-05-05T16:16:15.210", "metrics": {}, "published": "2026-05-05T16:16:15.210", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7c47e637dfadfbc691dd297b91d81ef939ca2080,8190f9ab6ad90cb97652adbebd238b874a4ef70d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bf3f395b9c37956eca866c9e1679769ed7dcce68,79a19bd936bb35f56ef0ccab1b3b59ebce8c762d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d470522c597b73e63cca04f3012aec28185113b7,f76d91271bcacbd759a2e4ee3ea61faa6a727ccf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5e00346deb7bf40a4cf70e3716ac8e9a2409eb55,d2719a0a9c3439abf67843a5504b7afccd9ded93)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8a52c772c7c6de72257a435bcad03d3bb914a70,2a72403b985aea6b4aac3171830492f9a387f9e1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583,5f6b17562f03fc65c7d3474ef8f1959b19d1ca41)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583,b5ad887339503103d0fbe9827b16ad287597c275)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583,a424a34b8faddf97b5af41689087e7a230f79ba7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bbec5998d7bd349730f59c959a8b00cfff816e34,*]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[59f751db7f392fa7a58cbd972205982f7f4f5854,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,6.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,6.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.78,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.20,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.10,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-05T17:45:05.910140+00:00", "title": "Un\u2011Cleared DMA Flag Causes UART TX Deadlock in Linux 8250 Driver", "updated": "2026-05-05T18:00:13.739434+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-668"]}