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This can lead to zero-size-pointer dereferences or\noverflowed transfer buffers in ni6501_port_command() and\nni6501_counter_command() if a (malicious) device has smaller max-packet\nsizes than expected (or when doing descriptor fuzz testing).\n\nAdd the missing sanity checks to probe()."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T11:42:02.159Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47476", "state": "PUBLISHED", "dateUpdated": "2024-11-04T11:42:02.159Z", "dateReserved": "2024-05-22T06:20:56.200Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-22T08:19:30.201Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: ni_usb6501: fix NULL-deref in command paths\n\nThe driver uses endpoint-sized USB transfer buffers but had no sanity\nchecks on the sizes. This can lead to zero-size-pointer dereferences or\noverflowed transfer buffers in ni6501_port_command() and\nni6501_counter_command() if a (malicious) device has smaller max-packet\nsizes than expected (or when doing descriptor fuzz testing).\n\nAdd the missing sanity checks to probe()."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: comedi: ni_usb6501: corrige NULL-deref en las rutas de comando El controlador usa b\u00faferes de transferencia USB del tama\u00f1o de un terminal, pero no tuvo controles de cordura en los tama\u00f1os. Esto puede provocar desreferencias de puntero de tama\u00f1o cero o b\u00faferes de transferencia desbordados en ni6501_port_command() y ni6501_counter_command() si un dispositivo (malicioso) tiene tama\u00f1os m\u00e1ximos de paquetes m\u00e1s peque\u00f1os de lo esperado (o cuando se realizan pruebas de descriptor difuso). Agregue las comprobaciones de cordura que faltan a probe()."}], "id": "CVE-2021-47476", "lastModified": "2024-11-21T06:36:15.453", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "PHYSICAL", "availabilityImpact": "HIGH", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-05-22T09:15:09.470", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/58478143771b20ab219937b1c30a706590a59224"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7ea"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/58478143771b20ab219937b1c30a706590a59224"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: comedi: ni_usb6501: fix NULL-deref in command paths", "id": "2282947", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282947"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncomedi: ni_usb6501: fix NULL-deref in command paths\nThe driver uses endpoint-sized USB transfer buffers but had no sanity\nchecks on the sizes. This can lead to zero-size-pointer dereferences or\noverflowed transfer buffers in ni6501_port_command() and\nni6501_counter_command() if a (malicious) device has smaller max-packet\nsizes than expected (or when doing descriptor fuzz testing).\nAdd the missing sanity checks to probe()."], "name": "CVE-2021-47476", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47476\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47476\nhttps://lore.kernel.org/linux-cve-announce/2024052236-CVE-2021-47476-5a68@gregkh/T"], "threat_severity": "Low"}