CVE-2026-89621

{"id": "CVE-2026-89621", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "cb38b1f149b7143355b37e86c841acf0076e5c2a", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "fffcfa367072628c3144cca17d2a3c3c9e50c057", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "c1c508e8923911cb458234997e55b7a4b9aa066f", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "127de5919820f88a9d55e8371ad4ac49f625f4c5", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "7c18fb36708a97ff6772825cc087b6d537bbf0d5", "versionType": "git"}, {"status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "2c9a6998c19503626c57a2267bf279e204113079", "versionType": "git"}], "programFiles": ["drivers/hid/hid-mcp2221.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.270", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.109", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.50", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hid/hid-mcp2221.c"], "defaultStatus": "affected"}]}], "published": "2026-09-11T20:19:47.397", "references": [{"url": "https://git.kernel.org/stable/c/127de5919820f88a9d55e8371ad4ac49f625f4c5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2c9a6998c19503626c57a2267bf279e204113079", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7c18fb36708a97ff6772825cc087b6d537bbf0d5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c1c508e8923911cb458234997e55b7a4b9aa066f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cb38b1f149b7143355b37e86c841acf0076e5c2a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fffcfa367072628c3144cca17d2a3c3c9e50c057", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "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."}], "lastModified": "2026-09-14T13:19:15.967", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}