{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89621","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.736Z","datePublished":"2026-09-11T19:45:19.420Z","dateUpdated":"2026-09-14T12:01:35.297Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-14T12:01:35.297Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: validate report size in mcp2221_raw_event()\n\nmcp2221_raw_event() never validates the size of incoming HID reports.\nIn the MCP2221_I2C_GET_DATA path it trusts the device-supplied data[3]\nas the copy length without checking that 4 + data[3] bytes actually\nexist in the received report. A malicious or misbehaving USB device can\nsend a short report with a large data[3], causing the memcpy to read\npast the valid report data in the HID transfer buffer and leak\nuninitialized kernel memory back to userspace through the I2C/SMBus\nread path.\n\nAdd a minimum size check at entry and validate that the source range\nfits within the received report before the copy."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-mcp2221.c"],"versions":[{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"cb38b1f149b7143355b37e86c841acf0076e5c2a","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"fffcfa367072628c3144cca17d2a3c3c9e50c057","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"c1c508e8923911cb458234997e55b7a4b9aa066f","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"127de5919820f88a9d55e8371ad4ac49f625f4c5","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"7c18fb36708a97ff6772825cc087b6d537bbf0d5","status":"affected","versionType":"git"},{"version":"67a95c21463d066060b0f66d65a75d45bb386ffb","lessThan":"2c9a6998c19503626c57a2267bf279e204113079","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/hid/hid-mcp2221.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"5.10.270","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.221","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.109","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.50","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"5.7","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/cb38b1f149b7143355b37e86c841acf0076e5c2a"},{"url":"https://git.kernel.org/stable/c/b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d"},{"url":"https://git.kernel.org/stable/c/fffcfa367072628c3144cca17d2a3c3c9e50c057"},{"url":"https://git.kernel.org/stable/c/c1c508e8923911cb458234997e55b7a4b9aa066f"},{"url":"https://git.kernel.org/stable/c/bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149"},{"url":"https://git.kernel.org/stable/c/127de5919820f88a9d55e8371ad4ac49f625f4c5"},{"url":"https://git.kernel.org/stable/c/7c18fb36708a97ff6772825cc087b6d537bbf0d5"},{"url":"https://git.kernel.org/stable/c/2c9a6998c19503626c57a2267bf279e204113079"}],"title":"HID: mcp2221: validate report size in mcp2221_raw_event()","x_generator":{"engine":"bippy-1.2.0"}}}}