{"api_version":"1","generated_at":"2026-08-22T21:52:58+00:00","cve":"CVE-2026-74681","urls":{"html":"https://cve.report/CVE-2026-74681","api":"https://cve.report/api/cve/CVE-2026-74681.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74681","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74681"},"summary":{"title":"usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg\n\nibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check\nin usbio_bulk_msg() compares it against txbuf_len — the bulk OUT\nendpoint size.  Both are taken independently from different endpoints\nin usbio_probe(), so the check is wrong when they differ.\n\nUse rxbuf_len for the IN direction.  This matches the buffer that\nactually holds the response data.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:42","updated_at":"2026-08-22 16:16:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5","name":"https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf","name":"https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124","name":"https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74681","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74681","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 121a0f839dbb397af5fabb701cea3e9983223e50 ebfd1e82ab0a6d26efd9bdd89de899215851f5bf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 121a0f839dbb397af5fabb701cea3e9983223e50 9ad0164f78b66b0b5eca3a5748cc94dd87e28124 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 121a0f839dbb397af5fabb701cea3e9983223e50 7e22c9f79b200672f3e477421b6c9050d8cf70a5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 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/usb/misc/usbio.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ebfd1e82ab0a6d26efd9bdd89de899215851f5bf","status":"affected","version":"121a0f839dbb397af5fabb701cea3e9983223e50","versionType":"git"},{"lessThan":"9ad0164f78b66b0b5eca3a5748cc94dd87e28124","status":"affected","version":"121a0f839dbb397af5fabb701cea3e9983223e50","versionType":"git"},{"lessThan":"7e22c9f79b200672f3e477421b6c9050d8cf70a5","status":"affected","version":"121a0f839dbb397af5fabb701cea3e9983223e50","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/misc/usbio.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","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":"6.18.45","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg\n\nibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check\nin usbio_bulk_msg() compares it against txbuf_len — the bulk OUT\nendpoint size.  Both are taken independently from different endpoints\nin usbio_probe(), so the check is wrong when they differ.\n\nUse rxbuf_len for the IN direction.  This matches the buffer that\nactually holds the response data."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:48.873Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf"},{"url":"https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124"},{"url":"https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5"}],"title":"usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74681","datePublished":"2026-08-22T15:32:48.873Z","dateReserved":"2026-08-15T05:44:03.925Z","dateUpdated":"2026-08-22T15:32:48.873Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:42","lastModifiedDate":"2026-08-22 16:16:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74681","Ordinal":"1","Title":"usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg","CVE":"CVE-2026-74681","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74681","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg\n\nibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check\nin usbio_bulk_msg() compares it against txbuf_len — the bulk OUT\nendpoint size.  Both are taken independently from different endpoints\nin usbio_probe(), so the check is wrong when they differ.\n\nUse rxbuf_len for the IN direction.  This matches the buffer that\nactually holds the response data.","Type":"Description","Title":"usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg"}]}}}