CVE-2024-41084

{"id": "CVE-2024-41084", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-07-29T16:15:03.873", "references": [{"url": "https://git.kernel.org/stable/c/285f2a08841432fc3e498b1cd00cce5216cdf189", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a9e099e29e925f8b31cfe53e8a786b9796f8e453", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b8a40a6dbfb0150c1081384caa9bbe28ce5d5060", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Avoid null pointer dereference in region lookup\n\ncxl_dpa_to_region() looks up a region based on a memdev and DPA.\nIt wrongly assumes an endpoint found mapping the DPA is also of\na fully assembled region. When not true it leads to a null pointer\ndereference looking up the region name.\n\nThis appears during testing of region lookup after a failure to\nassemble a BIOS defined region or if the lookup raced with the\nassembly of the BIOS defined region.\n\nFailure to clean up BIOS defined regions that fail assembly is an\nissue in itself and a fix to that problem will alleviate some of\nthe impact. It will not alleviate the race condition so let's harden\nthis path.\n\nThe behavior change is that the kernel oops due to a null pointer\ndereference is replaced with a dev_dbg() message noting that an\nendpoint was mapped.\n\nAdditional comments are added so that future users of this function\ncan more clearly understand what it provides."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: cxl/region: evitar la desreferencia del puntero nulo en la b\u00fasqueda de regiones cxl_dpa_to_region() busca una regi\u00f3n basada en memdev y DPA. Se supone err\u00f3neamente que un endpoint encontrado mapeando el DPA tambi\u00e9n pertenece a una regi\u00f3n completamente ensamblada. Cuando no es cierto, se produce una desreferencia del puntero nulo al buscar el nombre de la regi\u00f3n. Esto aparece durante la prueba de la b\u00fasqueda de regiones despu\u00e9s de un error al ensamblar una regi\u00f3n definida por el BIOS o si la b\u00fasqueda coincidi\u00f3 con el ensamblaje de la regi\u00f3n definida por el BIOS. No limpiar las regiones definidas por el BIOS que fallan en el ensamblaje es un problema en s\u00ed mismo y una soluci\u00f3n a ese problema aliviar\u00e1 parte del impacto. Esto no aliviar\u00e1 las condiciones de carrera, as\u00ed que endurezcamos este camino. El cambio de comportamiento es que el kernel oops debido a una desreferencia de puntero nulo se reemplaza con un mensaje dev_dbg() que indica que se asign\u00f3 un endpoint. Se agregan comentarios adicionales para que los futuros usuarios de esta funci\u00f3n puedan comprender m\u00e1s claramente lo que proporciona."}], "lastModified": "2024-08-22T13:18:10.240", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "99BA6BEA-A8FA-4C05-955A-F9CF38DD37DD", "versionEndExcluding": "6.6.37", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E95105F2-32E3-4C5F-9D18-7AEFD0E6275C", "versionEndExcluding": "6.9.8", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}