{"api_version":"1","generated_at":"2026-10-11T20:58:26+00:00","cve":"CVE-2026-98207","urls":{"html":"https://cve.report/CVE-2026-98207","api":"https://cve.report/api/cve/CVE-2026-98207.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98207","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98207"},"summary":{"title":"mmc: spi: reset bytes_xfered before retrying CRC failures","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: spi: reset bytes_xfered before retrying CRC failures\n\nmmc_spi_data_do() updates data->bytes_xfered after each block has been\ntransferred successfully.  If a later block in the same data request\nfails with a CRC error, data->bytes_xfered may therefore contain the\nnumber of bytes completed before the failing block.\n\nmmc_spi_request() has a private recovery path for such CRC failures.  It\nsends STOP_TRANSMISSION, clears data->error and jumps back to\ncrc_recover to issue the same command and data request again.  However,\nit does not clear data->bytes_xfered before the retry.\n\nIf the retry succeeds, the request is completed with the bytes from the\nfailed attempt still included in data->bytes_xfered.  For a multi-block\nrequest this can make the completed request report more bytes than were\ntransferred by the successful retry, and can even exceed the request size\nwhen most blocks completed before the CRC error.\n\nThis is most likely to be observed on MMC-over-SPI systems where long\nmulti-block transfers occasionally hit a data CRC error but the\nmmc_spi-internal retry succeeds.  The data itself is retried, but the\ncompletion accounting is not.\n\nClear data->bytes_xfered together with data->error before repeating the\nrequest so the final completion reports only the bytes transferred by the\nsuccessful attempt.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:06","updated_at":"2026-10-06 09:18:06"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d1acf4b9f6e9697406ce84ee9acfb92e094d5c7a","name":"https://git.kernel.org/stable/c/d1acf4b9f6e9697406ce84ee9acfb92e094d5c7a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0b8c8504593409954ed1a60db4e437d814e04023","name":"https://git.kernel.org/stable/c/0b8c8504593409954ed1a60db4e437d814e04023","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8b0cc8707f65e0f51912e764e1b309b2559db1ec","name":"https://git.kernel.org/stable/c/8b0cc8707f65e0f51912e764e1b309b2559db1ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3ae80c1fb7de4d3331427a955a44807745ac5a33","name":"https://git.kernel.org/stable/c/3ae80c1fb7de4d3331427a955a44807745ac5a33","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/57f5e29db63f7c80f1805d89234a74dcdbf60231","name":"https://git.kernel.org/stable/c/57f5e29db63f7c80f1805d89234a74dcdbf60231","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/da4929ee78ee701c3717543840798fedff66c430","name":"https://git.kernel.org/stable/c/da4929ee78ee701c3717543840798fedff66c430","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7d2f0ec16b300645f20435a6c3827b15e01419af","name":"https://git.kernel.org/stable/c/7d2f0ec16b300645f20435a6c3827b15e01419af","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4885e587f1afa9e1a573ab66f8c4d94d7b836d86","name":"https://git.kernel.org/stable/c/4885e587f1afa9e1a573ab66f8c4d94d7b836d86","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98207","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98207","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 7d2f0ec16b300645f20435a6c3827b15e01419af git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 d1acf4b9f6e9697406ce84ee9acfb92e094d5c7a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 0b8c8504593409954ed1a60db4e437d814e04023 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 da4929ee78ee701c3717543840798fedff66c430 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 57f5e29db63f7c80f1805d89234a74dcdbf60231 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 4885e587f1afa9e1a573ab66f8c4d94d7b836d86 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 3ae80c1fb7de4d3331427a955a44807745ac5a33 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 061c6c847eeb11743e489a16e907b41c6f9042b6 8b0cc8707f65e0f51912e764e1b309b2559db1ec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.37","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.37 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98207","cve":"CVE-2026-98207","epss":"0.001840000","percentile":"0.073030000","score_date":"2026-10-06","updated_at":"2026-10-07 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/mmc/host/mmc_spi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7d2f0ec16b300645f20435a6c3827b15e01419af","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"d1acf4b9f6e9697406ce84ee9acfb92e094d5c7a","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"0b8c8504593409954ed1a60db4e437d814e04023","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"da4929ee78ee701c3717543840798fedff66c430","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"57f5e29db63f7c80f1805d89234a74dcdbf60231","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"4885e587f1afa9e1a573ab66f8c4d94d7b836d86","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"3ae80c1fb7de4d3331427a955a44807745ac5a33","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"},{"lessThan":"8b0cc8707f65e0f51912e764e1b309b2559db1ec","status":"affected","version":"061c6c847eeb11743e489a16e907b41c6f9042b6","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/mmc/host/mmc_spi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.37"},{"lessThan":"2.6.37","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc4","versionStartIncluding":"2.6.37","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: spi: reset bytes_xfered before retrying CRC failures\n\nmmc_spi_data_do() updates data->bytes_xfered after each block has been\ntransferred successfully.  If a later block in the same data request\nfails with a CRC error, data->bytes_xfered may therefore contain the\nnumber of bytes completed before the failing block.\n\nmmc_spi_request() has a private recovery path for such CRC failures.  It\nsends STOP_TRANSMISSION, clears data->error and jumps back to\ncrc_recover to issue the same command and data request again.  However,\nit does not clear data->bytes_xfered before the retry.\n\nIf the retry succeeds, the request is completed with the bytes from the\nfailed attempt still included in data->bytes_xfered.  For a multi-block\nrequest this can make the completed request report more bytes than were\ntransferred by the successful retry, and can even exceed the request size\nwhen most blocks completed before the CRC error.\n\nThis is most likely to be observed on MMC-over-SPI systems where long\nmulti-block transfers occasionally hit a data CRC error but the\nmmc_spi-internal retry succeeds.  The data itself is retried, but the\ncompletion accounting is not.\n\nClear data->bytes_xfered together with data->error before repeating the\nrequest so the final completion reports only the bytes transferred by the\nsuccessful attempt."}],"providerMetadata":{"dateUpdated":"2026-10-06T08:44:44.241Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7d2f0ec16b300645f20435a6c3827b15e01419af"},{"url":"https://git.kernel.org/stable/c/d1acf4b9f6e9697406ce84ee9acfb92e094d5c7a"},{"url":"https://git.kernel.org/stable/c/0b8c8504593409954ed1a60db4e437d814e04023"},{"url":"https://git.kernel.org/stable/c/da4929ee78ee701c3717543840798fedff66c430"},{"url":"https://git.kernel.org/stable/c/57f5e29db63f7c80f1805d89234a74dcdbf60231"},{"url":"https://git.kernel.org/stable/c/4885e587f1afa9e1a573ab66f8c4d94d7b836d86"},{"url":"https://git.kernel.org/stable/c/3ae80c1fb7de4d3331427a955a44807745ac5a33"},{"url":"https://git.kernel.org/stable/c/8b0cc8707f65e0f51912e764e1b309b2559db1ec"}],"title":"mmc: spi: reset bytes_xfered before retrying CRC failures","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98207","datePublished":"2026-10-06T08:44:44.241Z","dateReserved":"2026-09-25T10:25:14.325Z","dateUpdated":"2026-10-06T08:44:44.241Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:06","lastModifiedDate":"2026-10-06 09:18:06","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98207","Ordinal":"1","Title":"mmc: spi: reset bytes_xfered before retrying CRC failures","CVE":"CVE-2026-98207","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98207","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: spi: reset bytes_xfered before retrying CRC failures\n\nmmc_spi_data_do() updates data->bytes_xfered after each block has been\ntransferred successfully.  If a later block in the same data request\nfails with a CRC error, data->bytes_xfered may therefore contain the\nnumber of bytes completed before the failing block.\n\nmmc_spi_request() has a private recovery path for such CRC failures.  It\nsends STOP_TRANSMISSION, clears data->error and jumps back to\ncrc_recover to issue the same command and data request again.  However,\nit does not clear data->bytes_xfered before the retry.\n\nIf the retry succeeds, the request is completed with the bytes from the\nfailed attempt still included in data->bytes_xfered.  For a multi-block\nrequest this can make the completed request report more bytes than were\ntransferred by the successful retry, and can even exceed the request size\nwhen most blocks completed before the CRC error.\n\nThis is most likely to be observed on MMC-over-SPI systems where long\nmulti-block transfers occasionally hit a data CRC error but the\nmmc_spi-internal retry succeeds.  The data itself is retried, but the\ncompletion accounting is not.\n\nClear data->bytes_xfered together with data->error before repeating the\nrequest so the final completion reports only the bytes transferred by the\nsuccessful attempt.","Type":"Description","Title":"mmc: spi: reset bytes_xfered before retrying CRC failures"}]}}}