[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f84VI_7A5KVk-hACSbwGlADw-fLGmxS5tfi3zfEG3xbs":3,"g5a-risk:CVE-2021-32846":118},{"success":4,"data":5,"meta":115},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":37,"epssPercentile":26,"epssTimeSeries":38,"severity":39,"affectedProducts":40,"affectedProductsCount":46,"references":47,"referencesCount":60,"weaknesses":61,"weaknessesCount":76,"isActivelyExploited":77,"cisaInfo":26,"otxData":26,"relatedBlogPosts":78,"seoMetadata":79,"configurations":104,"relatedVendorCves":113,"notableEvents":114},"CVE-2021-32846","What is CVE-2021-32846?","HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit af5eba2360a7351c08dfd9767d9be863a50ebaba.","HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lea...","2023-02-17T23:15:12.037","2023-06-26T17:47:01.82",7.8,"CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":26,"CVSSMetricV2":26,"CVSSMetricV40":26},[16,29],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":25,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","LOCAL","LOW","NONE","UNCHANGED","HIGH",null,1.8,5.9,{"Source":30,"Type":31,"CVSSData":32,"ExploitabilityScore":35,"ImpactScore":36},"security-advisories@github.com","Secondary",{"Version":20,"VectorString":33,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":34,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":25,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:H",7.7,2.5,5.2,0.00317,[37,37,37,37,37,37,37],"High",[41],{"vendor":42,"product":43,"version":44,"criteria":45,"vulnerable":4},"mobyproject","hyperkit","*","cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*",1,[48,53,56],{"url":49,"source":50,"tags":51},"https:\u002F\u002Fgithub.com\u002Fmoby\u002Fhyperkit\u002Fcommit\u002Faf5eba2360a7351c08dfd9767d9be863a50ebaba","GitHub",[52],"Patch",{"url":54,"source":50,"tags":55},"https:\u002F\u002Fgithub.com\u002Fmoby\u002Fhyperkit\u002Fpull\u002F313",[52],{"url":57,"source":50,"tags":58},"https:\u002F\u002Fsecuritylab.github.com\u002Fadvisories\u002FGHSL-2021-054_057-moby-hyperkit\u002F",[59],"Third Party Advisory",3,[62,70],{"id":63,"name":64,"description":65,"extendedDescription":66,"status":67,"abstraction":68,"structure":69},"CWE-754","Improper Check for Unusual or Exceptional Conditions","The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.","The programmer may assume that certain events or conditions will never occur or do not need to be worried about, such as low memory conditions, lack of access to resources due to restrictive permissions, or misbehaving clients or components. However, attackers may intentionally trigger these unusual conditions, thus violating the programmer's assumptions, possibly introducing instability, incorrect behavior, or a vulnerability.\nNote that this entry is not exclusively about the use of exceptions and exception handling, which are mechanisms for both checking and handling unusual or unexpected conditions.","Incomplete","Class","Simple",{"id":71,"name":72,"description":73,"extendedDescription":74,"status":67,"abstraction":75,"structure":69},"CWE-908","Use of Uninitialized Resource","The product uses or accesses a resource that has not been initialized.","When a resource has not been properly initialized, the product may behave unexpectedly. This may lead to a crash or invalid memory access, but the consequences vary depending on the type of resource and how it is used within the product.","Base",2,false,[],{"title":80,"metaDescription":81,"keywords":82,"canonicalUrl":83,"structuredData":84},"What is CVE-2021-32846? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-32846, a high severity cyber security vulnerability from 2023. HyperKit is a toolkit for embedding hypervisor capabilities...","CVE-2021-32846, CVE-2021-32846 vulnerability, CVE-2021-32846 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2023, CVSS score, exploit, patch, remediation, mobyproject security, hyperkit vulnerability","\u002Fwhat-is\u002Fcve-2021-32846",{"@context":85,"@type":86,"headline":80,"description":81,"datePublished":10,"dateModified":11,"author":87,"publisher":91,"about":95,"mainEntityOfPage":99,"articleSection":102,"keywords":103},"https:\u002F\u002Fschema.org","TechArticle",{"@type":88,"name":89,"url":90},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":88,"name":89,"url":90,"logo":92},{"@type":93,"url":94},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":96,"name":6,"description":97,"additionalType":98},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":100,"@id":101},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-32846","Cybersecurity","CVE-2021-32846, CVE-2021-32846 vulnerability, CVE-2021-32846 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[105],{"Operator":26,"Negate":26,"Nodes":106},[107],{"Operator":108,"Negate":26,"CPEMatch":109},"OR",[110],{"Vulnerable":4,"Criteria":45,"MatchCriteriaID":111,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":112},"0AE32831-24E2-44FD-939C-E6F799A5D632","0.20210107",[],[],{"lastModified":11,"cacheTime":116,"version":117},1792265965848,"2.0",{"score":119,"band":120,"action":121,"scoredAt":122},46,"Medium","Plan remediation","2026-10-16T06:57:12.143466+00:00"]