{"api_version":"1","generated_at":"2026-08-22T21:52:59+00:00","cve":"CVE-2026-74654","urls":{"html":"https://cve.report/CVE-2026-74654","api":"https://cve.report/api/cve/CVE-2026-74654.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74654","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74654"},"summary":{"title":"serial: 8250_dma: Clear stale RX state on shutdown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_dma: Clear stale RX state on shutdown\n\nserial8250_release_dma() terminates RX DMA and releases the channel, but\nleaves rx_running set.  If the port is closed while an RX transfer is\nactive, the stale state remains while rxchan is NULL until the channel is\nrequested again on the next open.\n\nThe DesignWare BUSY workaround added by commit a7b9ce39fbe4\n(\"serial: 8250_dw: Ensure BUSY is deasserted\") calls\nserial8250_rx_dma_flush() from the LCR write path during startup.  This\nhappens before serial8250_request_dma() obtains a new RX channel.  On\nreopen, the stale rx_running state therefore makes the flush path pass a\nNULL channel to dmaengine_pause(), causing a kernel Oops.\n\nClear rx_running after terminating RX DMA, matching the TX cleanup.  Also\nmake the flush helper return if the DMA object or RX channel is not\navailable so startup and teardown paths cannot pass a NULL channel to the\nDMAengine API.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:38","updated_at":"2026-08-22 16:16:38"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41","name":"https://git.kernel.org/stable/c/e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9f2444f4c0e4b06f61bae38da87c9c94c78efa86","name":"https://git.kernel.org/stable/c/9f2444f4c0e4b06f61bae38da87c9c94c78efa86","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bf4fb620e02962b2b52500a4b3d8420f351eb46a","name":"https://git.kernel.org/stable/c/bf4fb620e02962b2b52500a4b3d8420f351eb46a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae05d9e50b6b9f246c110b3bdc03676145c2d0d4","name":"https://git.kernel.org/stable/c/ae05d9e50b6b9f246c110b3bdc03676145c2d0d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d06cfb1add4a2d5b393e9e31f49ebbd168beea49","name":"https://git.kernel.org/stable/c/d06cfb1add4a2d5b393e9e31f49ebbd168beea49","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7a5d792cf64a2096e18f1d573cc3d01cba15e92","name":"https://git.kernel.org/stable/c/e7a5d792cf64a2096e18f1d573cc3d01cba15e92","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7e3cc6709caa49d1d6ce6c1f7cb305e38675cc9","name":"https://git.kernel.org/stable/c/e7e3cc6709caa49d1d6ce6c1f7cb305e38675cc9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e10f06ee050a08930e2339b6fec7148fd0b2a8f6","name":"https://git.kernel.org/stable/c/e10f06ee050a08930e2339b6fec7148fd0b2a8f6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74654","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74654","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe bf4fb620e02962b2b52500a4b3d8420f351eb46a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe e10f06ee050a08930e2339b6fec7148fd0b2a8f6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe d06cfb1add4a2d5b393e9e31f49ebbd168beea49 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0fcb7901f9d61a325b4c5b88c600383bcbeb97fe e7a5d792cf64a2096e18f1d573cc3d01cba15e92 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/tty/serial/8250/8250_dma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bf4fb620e02962b2b52500a4b3d8420f351eb46a","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"e10f06ee050a08930e2339b6fec7148fd0b2a8f6","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"d06cfb1add4a2d5b393e9e31f49ebbd168beea49","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"e7a5d792cf64a2096e18f1d573cc3d01cba15e92","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"9f2444f4c0e4b06f61bae38da87c9c94c78efa86","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"ae05d9e50b6b9f246c110b3bdc03676145c2d0d4","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"e7e3cc6709caa49d1d6ce6c1f7cb305e38675cc9","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"},{"lessThan":"e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41","status":"affected","version":"0fcb7901f9d61a325b4c5b88c600383bcbeb97fe","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/tty/serial/8250/8250_dma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.19"},{"lessThan":"3.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"3.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_dma: Clear stale RX state on shutdown\n\nserial8250_release_dma() terminates RX DMA and releases the channel, but\nleaves rx_running set.  If the port is closed while an RX transfer is\nactive, the stale state remains while rxchan is NULL until the channel is\nrequested again on the next open.\n\nThe DesignWare BUSY workaround added by commit a7b9ce39fbe4\n(\"serial: 8250_dw: Ensure BUSY is deasserted\") calls\nserial8250_rx_dma_flush() from the LCR write path during startup.  This\nhappens before serial8250_request_dma() obtains a new RX channel.  On\nreopen, the stale rx_running state therefore makes the flush path pass a\nNULL channel to dmaengine_pause(), causing a kernel Oops.\n\nClear rx_running after terminating RX DMA, matching the TX cleanup.  Also\nmake the flush helper return if the DMA object or RX channel is not\navailable so startup and teardown paths cannot pass a NULL channel to the\nDMAengine API."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:29.263Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bf4fb620e02962b2b52500a4b3d8420f351eb46a"},{"url":"https://git.kernel.org/stable/c/e10f06ee050a08930e2339b6fec7148fd0b2a8f6"},{"url":"https://git.kernel.org/stable/c/d06cfb1add4a2d5b393e9e31f49ebbd168beea49"},{"url":"https://git.kernel.org/stable/c/e7a5d792cf64a2096e18f1d573cc3d01cba15e92"},{"url":"https://git.kernel.org/stable/c/9f2444f4c0e4b06f61bae38da87c9c94c78efa86"},{"url":"https://git.kernel.org/stable/c/ae05d9e50b6b9f246c110b3bdc03676145c2d0d4"},{"url":"https://git.kernel.org/stable/c/e7e3cc6709caa49d1d6ce6c1f7cb305e38675cc9"},{"url":"https://git.kernel.org/stable/c/e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41"}],"title":"serial: 8250_dma: Clear stale RX state on shutdown","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74654","datePublished":"2026-08-22T15:32:29.263Z","dateReserved":"2026-08-15T05:44:03.923Z","dateUpdated":"2026-08-22T15:32:29.263Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:38","lastModifiedDate":"2026-08-22 16:16:38","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74654","Ordinal":"1","Title":"serial: 8250_dma: Clear stale RX state on shutdown","CVE":"CVE-2026-74654","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74654","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_dma: Clear stale RX state on shutdown\n\nserial8250_release_dma() terminates RX DMA and releases the channel, but\nleaves rx_running set.  If the port is closed while an RX transfer is\nactive, the stale state remains while rxchan is NULL until the channel is\nrequested again on the next open.\n\nThe DesignWare BUSY workaround added by commit a7b9ce39fbe4\n(\"serial: 8250_dw: Ensure BUSY is deasserted\") calls\nserial8250_rx_dma_flush() from the LCR write path during startup.  This\nhappens before serial8250_request_dma() obtains a new RX channel.  On\nreopen, the stale rx_running state therefore makes the flush path pass a\nNULL channel to dmaengine_pause(), causing a kernel Oops.\n\nClear rx_running after terminating RX DMA, matching the TX cleanup.  Also\nmake the flush helper return if the DMA object or RX channel is not\navailable so startup and teardown paths cannot pass a NULL channel to the\nDMAengine API.","Type":"Description","Title":"serial: 8250_dma: Clear stale RX state on shutdown"}]}}}