{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97502",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-24T16:01:01.151Z",
        "datePublished": "2026-09-24T16:04:49.056Z",
        "dateUpdated": "2026-10-03T10:59:02.767Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-03T10:59:02.767Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: davinci: avoid NULL deref of host->data in IRQ handler\n\nmmc_davinci_irq() returns early only when both host->cmd and\nhost->data are NULL:\n\n  if (host->cmd == NULL && host->data == NULL) {\n          ...\n          return IRQ_NONE;\n  }\n\nSo we may legitimately reach the rest of the handler with\nhost->data == NULL (and therefore data == NULL). The DATDNE branch\nalready guards against this with an explicit \"if (data != NULL)\"\ncheck, but the subsequent TOUTRD (\"read data timeout\") and\nCRCWR/CRCRD (\"data CRC error\") branches dereference data\nunconditionally:\n\n  if (qstatus & MMCST0_TOUTRD) {\n          data->error = -ETIMEDOUT;        <-- NULL deref\n          ...\n          davinci_abort_data(host, data);\n  }\n\n  if (qstatus & (MMCST0_CRCWR | MMCST0_CRCRD)) {\n          data->error = -EILSEQ;           <-- NULL deref\n          ...\n  }\n\nIf either bit is set in qstatus while host->data is NULL, the kernel\nwill crash inside the IRQ handler. smatch flags this:\n\n  drivers/mmc/host/davinci_mmc.c:933 mmc_davinci_irq() error: we\n    previously assumed 'data' could be null (see line 914)\n\nGate both branches on a non-NULL data, matching the existing pattern\nused by the DATDNE branch.\n\nNo functional change for callers where data is non-NULL, which is\nthe only case in which these branches did meaningful work before\nthis change."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/mmc/host/davinci_mmc.c"
                    ],
                    "versions": [
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "51738de7dd5f8e8b33dfc07ef85bc06d3bf41e96",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "f216cf00e829895ff49bdf695c944915e59bd698",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "a0cde8d70d64c1a75fbd57f01d9f2d7cccac8319",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "3c5e3e5badbf0592332887d12db02458323682c3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "a01cedf230dc0fcd55b994f5e548d3982ba4c732",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "5b7e151fe9ea9311ba601849aaecdc4fc97fd577",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b4cff4549b7a8c5fc8b88e3493b6287555f0512c",
                            "lessThan": "4f28846aaf8db9668e338b8987973f8935edff34",
                            "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/mmc/host/davinci_mmc.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.33",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.33",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "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": "2.6.33",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.33",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.33",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.33",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.33",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.33",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.33",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/51738de7dd5f8e8b33dfc07ef85bc06d3bf41e96"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f216cf00e829895ff49bdf695c944915e59bd698"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a0cde8d70d64c1a75fbd57f01d9f2d7cccac8319"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3c5e3e5badbf0592332887d12db02458323682c3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a01cedf230dc0fcd55b994f5e548d3982ba4c732"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5b7e151fe9ea9311ba601849aaecdc4fc97fd577"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4f28846aaf8db9668e338b8987973f8935edff34"
                }
            ],
            "title": "mmc: davinci: avoid NULL deref of host->data in IRQ handler",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}