{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74654",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.923Z",
        "datePublished": "2026-08-22T15:32:29.263Z",
        "dateUpdated": "2026-08-22T15:32:29.263Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-22T15:32:29.263Z"
            },
            "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."
                }
            ],
            "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": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "bf4fb620e02962b2b52500a4b3d8420f351eb46a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "e10f06ee050a08930e2339b6fec7148fd0b2a8f6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "d06cfb1add4a2d5b393e9e31f49ebbd168beea49",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "e7a5d792cf64a2096e18f1d573cc3d01cba15e92",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "9f2444f4c0e4b06f61bae38da87c9c94c78efa86",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "ae05d9e50b6b9f246c110b3bdc03676145c2d0d4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "e7e3cc6709caa49d1d6ce6c1f7cb305e38675cc9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fcb7901f9d61a325b4c5b88c600383bcbeb97fe",
                            "lessThan": "e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tty/serial/8250/8250_dma.c"
                    ],
                    "versions": [
                        {
                            "version": "3.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.152",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.104",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.45",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.9",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "3.19",
                                    "versionEndExcluding": "5.10.265"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "5.15.216"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.1.183"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.6.152"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.12.104"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "6.18.45"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "7.1.9"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.19",
                                    "versionEndExcluding": "7.2"
                                }
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                }
            ],
            "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"
            }
        }
    }
}