CVE-2021-20257

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This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability."}, {"lang": "es", "value": "Se ha encontrado un fallo de bucle infinito en el emulador NIC e1000 de QEMU. Este problema se produce mientras son procesados descriptores de transmisi\u00f3n (tx) en la funci\u00f3n process_tx_desc si varios campos del descriptor son inicializados con valores no v\u00e1lidos. Este fallo permite a un hu\u00e9sped consumir ciclos de CPU en el host, resultando en una denegaci\u00f3n de servicio. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema"}], "lastModified": "2024-11-21T05:46:13.570", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AC80F3BA-7E42-4883-9968-EDFC1BBC0695", "versionEndExcluding": "6.2.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "542B31BD-5767-4B33-9201-40548D1223B3"}, {"criteria": "cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C52600BF-9E87-4CD2-91F3-685AFE478C1E"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*", "vulnerable": true, "matchCriteriaId": "3AA08768-75AF-4791-B229-AE938C780959"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "87C21FE1-EA5C-498F-9C6C-D05F91A88217"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "47811209-5CE5-4375-8391-B0A7F6A0E420"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1CD81C46-328B-412D-AF4E-68A2AD2F1A73"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "87C21FE1-EA5C-498F-9C6C-D05F91A88217"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "47811209-5CE5-4375-8391-B0A7F6A0E420"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}