CVE-2022-49820

{"id": "CVE-2022-49820", "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": "2025-05-01T15:16:05.413", "references": [{"url": "https://git.kernel.org/stable/c/9cbd48d5fa14e4c65f8580de16686077f7cea02b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a5915a9a3ab4067ef8996a57738d156eabeb3a12", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmctp i2c: don't count unused / invalid keys for flow release\n\nWe're currently hitting the WARN_ON in mctp_i2c_flow_release:\n\n if (midev->release_count > midev->i2c_lock_count) {\n WARN_ONCE(1, \"release count overflow\");\n\nThis may be hit if we expire a flow before sending the first packet it\ncontains - as we will not be pairing the increment of release_count\n(performed on flow release) with the i2c lock operation (only\nperformed on actual TX).\n\nTo fix this, only release a flow if we've encountered it previously (ie,\ndev_flow_state does not indicate NEW), as we will mark the flow as\nACTIVE at the same time as accounting for the i2c lock operation. We\nalso need to add an INVALID flow state, to indicate when we've done the\nrelease."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mctp i2c: no cuente las claves no utilizadas o no v\u00e1lidas para la liberaci\u00f3n del flujo Actualmente estamos alcanzando el WARN_ON en mctp_i2c_flow_release: if (midev->release_count > midev->i2c_lock_count) { WARN_ONCE(1, \"release count overflow\"); Esto puede ser alcanzado si expiramos un flujo antes de enviar el primer paquete que contiene, ya que no estaremos emparejando el incremento de release_count (realizado en la liberaci\u00f3n del flujo) con la operaci\u00f3n de bloqueo i2c (solo se realiza en TX real). Para corregir esto, solo libere un flujo si lo hemos encontrado previamente (es decir, dev_flow_state no indica NUEVO), ya que marcaremos el flujo como ACTIVO al mismo tiempo que contabilizamos la operaci\u00f3n de bloqueo i2c. Tambi\u00e9n necesitamos agregar un estado de flujo INV\u00c1LIDO, para indicar cu\u00e1ndo hemos realizado la liberaci\u00f3n."}], "lastModified": "2025-11-10T20:45:23.667", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C26F938-1D52-4536-9D3F-4796538E0B0A", "versionEndExcluding": "6.0.10", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}