{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-23T06:36:45.777","vulnerabilities":[{"cve":{"id":"CVE-2023-46842","sourceIdentifier":"security@xen.org","published":"2024-05-16T14:15:08.317","lastModified":"2026-01-05T19:05:51.763","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and\nother modes.  This in particular means that they may set registers used\nto pass 32-bit-mode hypercall arguments to values outside of the range\n32-bit code would be able to set them to.\n\nWhen processing of hypercalls takes a considerable amount of time,\nthe hypervisor may choose to invoke a hypercall continuation.  Doing so\ninvolves putting (perhaps updated) hypercall arguments in respective\nregisters.  For guests not running in 64-bit mode this further involves\na certain amount of translation of the values.\n\nUnfortunately internal sanity checking of these translated values\nassumes high halves of registers to always be clear when invoking a\nhypercall.  When this is found not to be the case, it triggers a\nconsistency check in the hypervisor and causes a crash.\n"},{"lang":"es","value":"A diferencia de los huéspedes PV de 32 bits, los huéspedes HVM pueden cambiar libremente entre 64 bits y otros modos. Esto significa en particular que pueden configurar los registros utilizados para pasar argumentos de hiperllamada en modo de 32 bits a valores fuera del rango en el que el código de 32 bits podría configurarlos. Cuando el procesamiento de hiperllamadas toma una cantidad considerable de tiempo, el hipervisor puede optar por invocar una continuación de hiperllamada. Hacerlo implica colocar argumentos de hiperllamada (quizás actualizados) en los registros respectivos. Para los huéspedes que no se ejecutan en modo de 64 bits, esto implica además una cierta cantidad de traducción de los valores. Desafortunadamente, la comprobación de cordura interna de estos valores traducidos supone que las mitades altas de los registros siempre están limpias al invocar una hiperllamada. Cuando se descubre que este no es el caso, se activa una comprobación de coherencia en el hipervisor y se produce un bloqueo."}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.0,"impactScore":4.0}]},"weaknesses":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-843"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*","versionStartIncluding":"3.2.0","matchCriteriaId":"07AD4949-CFD3-4551-B63D-B307F8EB10FC"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*","matchCriteriaId":"CC559B26-5DFC-4B7A-A27C-B77DE755DFF9"},{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*","matchCriteriaId":"CA277A6C-83EC-4536-9125-97B84C4FAF59"}]}]}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-454.html","source":"security@xen.org","tags":["Patch","Vendor Advisory"]},{"url":"http://xenbits.xen.org/xsa/advisory-454.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D5OK6MH75S7YWD34EWW7QIZTS627RIE3/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RYAZ7P6YFJ2E3FHKAGIKHWS46KYMMTZH/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"https://xenbits.xenproject.org/xsa/advisory-454.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]}]}}]}