CVE-2025-37984

{"id": "CVE-2025-37984", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "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": "2025-05-20T18:15:45.253", "references": [{"url": "https://git.kernel.org/stable/c/921b8167f10708e38080f84e195cdc68a7a561f1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b16510a530d1e6ab9683f04f8fb34f2e0f538275", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f02f0218be412cff1c844addf58e002071be298b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f2133b849ff273abddb6da622daddd8f6f6fa448", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()\n\nHerbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa\nimplementation's ->key_size() callback returns an unusually large value.\nHerbert instead suggests (for a division by 8):\n\n X / 8 + !!(X & 7)\n\nBased on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and\nuse it in lieu of DIV_ROUND_UP() for ->key_size() return values.\n\nAdditionally, use the macro in ecc_digits_from_bytes(), whose \"nbytes\"\nparameter is a ->key_size() return value in some instances, or a\nuser-specified ASN.1 length in the case of ecdsa_get_signature_rs()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: crypto: ecdsa - Protecci\u00f3n contra desbordamientos de enteros en DIV_ROUND_UP(). Herbert se\u00f1ala que DIV_ROUND_UP() puede desbordarse innecesariamente si la funci\u00f3n de retorno ->key_size() de una implementaci\u00f3n de ecdsa devuelve un valor inusualmente grande. En su lugar, Herbert sugiere (para una divisi\u00f3n entre 8): X / 8 + !!(X y 7). Con base en esta f\u00f3rmula, introduzca una macro gen\u00e9rica DIV_ROUND_UP_POW2() y \u00fasela en lugar de DIV_ROUND_UP() para los valores de retorno de ->key_size(). Adem\u00e1s, utilice la macro en ecc_digits_from_bytes(), cuyo par\u00e1metro \"nbytes\" es un valor de retorno de ->key_size() en algunos casos, o una longitud ASN.1 especificada por el usuario en el caso de ecdsa_get_signature_rs()."}], "lastModified": "2025-11-14T17:00:02.113", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7CCA2E29-450F-44AE-B634-FCC3BAF6D1F3", "versionEndExcluding": "6.6.99", "versionStartIncluding": "6.6.70"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5E0A7E52-CDBF-45E4-8338-F679910D5C1B", "versionEndExcluding": "6.12.39", "versionStartIncluding": "6.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B25CA7E-4CD0-46DB-B4EF-13A3516071FB", "versionEndExcluding": "6.14.5", "versionStartIncluding": "6.13"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}