CVE-2026-23307

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driver as the max size of the buffer.\n\nWhen parsing the messages in ems_usb_read_bulk_callback() properly check\nthe size both at the beginning of parsing the message to make sure it is\nbig enough for the expected structure, and at the end of the message to\nmake sure we don't overflow past the end of the buffer for the next\nmessage."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): comprobar la longitud adecuada de un mensaje\n\nAl examinar los datos en un urb USB, la actual_length es el tama\u00f1o del b\u00fafer pasado al controlador, no la transfer_buffer_length que es establecida por el controlador como el tama\u00f1o m\u00e1ximo del b\u00fafer.\n\nAl analizar los mensajes en ems_usb_read_bulk_callback(), comprobar correctamente el tama\u00f1o tanto al principio del an\u00e1lisis del mensaje para asegurarse de que sea lo suficientemente grande para la estructura esperada, como al final del mensaje para asegurarse de que no desbordemos m\u00e1s all\u00e1 del final del b\u00fafer para el siguiente mensaje."}], "id": "CVE-2026-23307", "lastModified": "2026-11-05T22:18:13.810", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23307", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:26:25.701712Z", "version": "2.0.3"}}]}, "published": "2026-03-25T11:16:26.657", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1818974e1b5ef200e27f144c8cb8a246420bb54d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/18f75b9cbdc3703f15965425ab69dee509b07785"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1cf469026d4a2308eaa91d04dca4a900d07a5c2e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2833e13e2b099546abf5d40a483b4eb04ddd1f7b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/38a01c9700b0dcafe97dfa9dc7531bf4a245deff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aed172a2e2330131f0977d2acd3ec8883f413ec1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c703bbf8e9b4947e111c88d2ed09236a6772a471"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f10177e6c4575aedaea580ce67d792fab7a2235e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message", "id": "2451195", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451195"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the Linux kernel's ems_usb module. This vulnerability occurs because the system does not properly verify the length of messages it receives. An attacker could exploit this weakness by sending specially crafted messages, potentially causing the system to crash (Denial of Service) or, in some cases, execute unauthorized code."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent the ems_usb module from being loaded. See https://access.redhat.com/solutions/41278 for instructions."}, "name": "CVE-2026-23307", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23307\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23307\nhttps://lore.kernel.org/linux-cve-announce/2026032528-CVE-2026-23307-60f2@gregkh/T"], "statement": "This flaw affects systems with EMS CPC-USB CAN adapters. The driver fails to properly validate message lengths when parsing USB URB data, potentially allowing buffer overflows. A malicious USB device could send crafted messages to trigger out-of-bounds reads or writes. Physical access to connect the USB device is required.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[702171adeed3607ee9603ec30ce081411e36ae42,c703bbf8e9b4947e111c88d2ed09236a6772a471)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[702171adeed3607ee9603ec30ce081411e36ae42,1818974e1b5ef200e27f144c8cb8a246420bb54d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[702171adeed3607ee9603ec30ce081411e36ae42,18f75b9cbdc3703f15965425ab69dee509b07785)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[702171adeed3607ee9603ec30ce081411e36ae42,1cf469026d4a2308eaa91d04dca4a900d07a5c2e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[702171adeed3607ee9603ec30ce081411e36ae42,2833e13e2b099546abf5d40a483b4eb04ddd1f7b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[702171adeed3607ee9603ec30ce081411e36ae42,38a01c9700b0dcafe97dfa9dc7531bf4a245deff)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.32"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.32)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.77,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.17,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.7,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-03-25T21:15:23.151660+00:00", "updated": "2026-05-28T15:45:19.844403+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}