{"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"}}}}