{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89622", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.737Z", "datePublished": "2026-09-11T19:45:20.090Z", "dateUpdated": "2026-09-11T19:45:20.090Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:20.090Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: clear rxbuf after I2C/SMBus transfer completes\n\nmcp_i2c_smbus_read() stores the caller-supplied buffer pointer in\nmcp->rxbuf for the duration of a transfer but never clears it when the\ntransfer finishes or times out. Once the caller frees or reuses the\nbuffer, mcp->rxbuf becomes a dangling pointer. A delayed or spurious\nMCP2221_I2C_GET_DATA report can then drive mcp2221_raw_event() to\nmemcpy device data into the freed memory, causing a write\nuse-after-free.\n\nRoute all return paths through a single exit point that clears\nmcp->rxbuf and mcp->rxbuf_size, so that the existing !mcp->rxbuf guard\nin the raw_event handler can reject any report arriving after the\ntransfer has ended."}], "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": "03c34309eb1bce1b3b5f7c4a94b703f419120383", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "968546b676d992dd1da3e057d40598231f725996", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "db2333f88729c8aae062cb171ed058725ff5c901", "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": "6.18.51", "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": "6.18.51"}, {"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/03c34309eb1bce1b3b5f7c4a94b703f419120383"}, {"url": "https://git.kernel.org/stable/c/968546b676d992dd1da3e057d40598231f725996"}, {"url": "https://git.kernel.org/stable/c/db2333f88729c8aae062cb171ed058725ff5c901"}], "title": "HID: mcp2221: clear rxbuf after I2C/SMBus transfer completes", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hid/hid-mcp2221.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "03c34309eb1bce1b3b5f7c4a94b703f419120383", "status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "versionType": "git"}, {"lessThan": "968546b676d992dd1da3e057d40598231f725996", "status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "versionType": "git"}, {"lessThan": "db2333f88729c8aae062cb171ed058725ff5c901", "status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hid/hid-mcp2221.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: clear rxbuf after I2C/SMBus transfer completes\n\nmcp_i2c_smbus_read() stores the caller-supplied buffer pointer in\nmcp->rxbuf for the duration of a transfer but never clears it when the\ntransfer finishes or times out. Once the caller frees or reuses the\nbuffer, mcp->rxbuf becomes a dangling pointer. A delayed or spurious\nMCP2221_I2C_GET_DATA report can then drive mcp2221_raw_event() to\nmemcpy device data into the freed memory, causing a write\nuse-after-free.\n\nRoute all return paths through a single exit point that clears\nmcp->rxbuf and mcp->rxbuf_size, so that the existing !mcp->rxbuf guard\nin the raw_event handler can reject any report arriving after the\ntransfer has ended."}], "id": "CVE-2026-89622", "lastModified": "2026-09-11T20:19:47.517", "metrics": {}, "published": "2026-09-11T20:19:47.517", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03c34309eb1bce1b3b5f7c4a94b703f419120383"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/968546b676d992dd1da3e057d40598231f725996"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db2333f88729c8aae062cb171ed058725ff5c901"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Use-after-free in HID mcp2221 driver can lead to arbitrary code execution", "id": "2532029", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532029"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's HID (Human Interface Device) subsystem, specifically in the mcp2221 driver. This vulnerability occurs because the driver fails to clear a buffer pointer after an I2C/SMBus transfer completes. A local attacker could exploit this by triggering a delayed or unexpected report, leading to a use-after-free condition. This could result in arbitrary code execution or a denial of service."], "name": "CVE-2026-89622", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:45:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89622\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89622\nhttps://git.kernel.org/stable/c/03c34309eb1bce1b3b5f7c4a94b703f419120383\nhttps://git.kernel.org/stable/c/968546b676d992dd1da3e057d40598231f725996\nhttps://git.kernel.org/stable/c/db2333f88729c8aae062cb171ed058725ff5c901"], "threat_severity": "Important"}

{}