[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fPBEajsyE08xcGJMGVf-IvsIDBO7kcZlYeIoflJM3y6U":3,"g5a-risk:CVE-2021-3748":200},{"success":4,"data":5,"meta":198},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":38,"epssPercentile":25,"epssTimeSeries":39,"severity":40,"affectedProducts":41,"affectedProductsCount":79,"references":80,"referencesCount":116,"weaknesses":117,"weaknessesCount":126,"isActivelyExploited":127,"cisaInfo":25,"otxData":25,"relatedBlogPosts":128,"seoMetadata":129,"configurations":154,"relatedVendorCves":196,"notableEvents":197},"CVE-2021-3748","What is CVE-2021-3748?","A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.","A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access regi...","2022-03-23T20:15:09.893","2023-01-03T15:16:38.483",7.5,"CVSS:3.1\u002FAV:L\u002FAC:H\u002FPR:H\u002FUI:N\u002FS:C\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":25,"CVSSMetricV2":28,"CVSSMetricV40":25},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":26,"ImpactScore":27},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":22,"IntegrityImpact":22,"AvailabilityImpact":22,"BaseScore":12,"BaseSeverity":22,"ExploitCodeMaturity":25,"RemediationLevel":25,"ReportConfidence":25,"TemporalScore":25,"TemporalSeverity":25,"ConfidentialityRequirement":25,"IntegrityRequirement":25,"AvailabilityRequirement":22,"ModifiedAttackVector":25,"ModifiedAttackComplexity":25,"ModifiedPrivilegesRequired":25,"ModifiedUserInteraction":25,"ModifiedScope":25,"ModifiedConfidentialityImpact":25,"ModifiedIntegrityImpact":25,"ModifiedAvailabilityImpact":25,"EnvironmentalScore":25,"EnvironmentalSeverity":25},"3.1","LOCAL","HIGH","NONE","CHANGED",null,0.8,6,[29],{"Source":17,"Type":18,"CVSSData":30,"BaseSeverity":33,"ExploitabilityScore":36,"ImpactScore":37,"ACInsufInfo":25,"ObtainAllPrivilege":25,"ObtainUserPrivilege":25,"ObtainOtherPrivilege":25,"UserInteractionRequired":25},{"Version":31,"VectorString":32,"AccessVector":21,"AccessComplexity":33,"Authentication":23,"ConfidentialityImpact":34,"IntegrityImpact":34,"AvailabilityImpact":34,"BaseScore":35,"BaseSeverity":25,"Exploitability":25,"RemediationLevel":25,"ReportConfidence":25,"TemporalScore":25,"CollateralDamagePotential":25,"TargetDistribution":25,"ConfidentialityRequirement":25,"IntegrityRequirement":25,"AvailabilityRequirement":25,"EnvironmentalScore":25},"2.0","AV:L\u002FAC:M\u002FAu:N\u002FC:C\u002FI:C\u002FA:C","MEDIUM","COMPLETE",6.9,3.4,10,0.00522,[38,38,38,38,38,38,38],"High",[42,46,51,54,59,62,65,70,75],{"vendor":43,"product":43,"version":44,"criteria":45,"vulnerable":4},"qemu","*","cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",{"vendor":47,"product":48,"version":49,"criteria":50,"vulnerable":4},"debian","debian_linux","9.0","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",{"vendor":47,"product":48,"version":52,"criteria":53,"vulnerable":4},"10.0","cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",{"vendor":55,"product":56,"version":57,"criteria":58,"vulnerable":4},"canonical","ubuntu_linux","18.04","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",{"vendor":55,"product":56,"version":60,"criteria":61,"vulnerable":4},"20.04","cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",{"vendor":55,"product":56,"version":63,"criteria":64,"vulnerable":4},"21.10","cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*",{"vendor":66,"product":67,"version":68,"criteria":69,"vulnerable":4},"fedoraproject","fedora","34","cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",{"vendor":71,"product":72,"version":73,"criteria":74,"vulnerable":4},"redhat","enterprise_linux","8.0","cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*",{"vendor":71,"product":76,"version":77,"criteria":78,"vulnerable":4},"enterprise_linux_advanced_virtualization_eus","8.4","cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*",9,[81,88,92,97,100,104,108,112],{"url":82,"source":83,"tags":84},"https:\u002F\u002Fbugzilla.redhat.com\u002Fshow_bug.cgi?id=1998514","Red Hat",[85,86,87],"Issue Tracking","Patch","Third Party Advisory",{"url":89,"source":90,"tags":91},"https:\u002F\u002Fgithub.com\u002Fqemu\u002Fqemu\u002Fcommit\u002Fbedd7e93d01961fcb16a97ae45d93acf357e11f6","GitHub",[86,87],{"url":93,"source":94,"tags":95},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2022\u002F04\u002Fmsg00002.html","Debian",[96,87],"Mailing List",{"url":98,"source":94,"tags":99},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2022\u002F09\u002Fmsg00008.html",[96,87],{"url":101,"source":102,"tags":103},"https:\u002F\u002Flists.nongnu.org\u002Farchive\u002Fhtml\u002Fqemu-devel\u002F2021-09\u002Fmsg00388.html","Nongnu",[96,86,87],{"url":105,"source":106,"tags":107},"https:\u002F\u002Fsecurity.gentoo.org\u002Fglsa\u002F202208-27","Gentoo",[87],{"url":109,"source":110,"tags":111},"https:\u002F\u002Fsecurity.netapp.com\u002Fadvisory\u002Fntap-20220425-0004\u002F","Netapp",[87],{"url":113,"source":114,"tags":115},"https:\u002F\u002Fubuntu.com\u002Fsecurity\u002FCVE-2021-3748","Ubuntu",[86,87],8,[118],{"id":119,"name":120,"description":121,"extendedDescription":122,"status":123,"abstraction":124,"structure":125},"CWE-416","Use After Free","The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","","Stable","Variant","Simple",1,false,[],{"title":130,"metaDescription":131,"keywords":132,"canonicalUrl":133,"structuredData":134},"What is CVE-2021-3748? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-3748, a high severity cyber security vulnerability from 2022. A use-after-free vulnerability was found in the virtio-net d...","CVE-2021-3748, CVE-2021-3748 vulnerability, CVE-2021-3748 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2022, CVSS score, exploit, patch, remediation, qemu security, debian security, canonical security, fedoraproject security, redhat security, qemu vulnerability, debian_linux vulnerability, ubuntu_linux vulnerability","\u002Fwhat-is\u002Fcve-2021-3748",{"@context":135,"@type":136,"headline":130,"description":131,"datePublished":10,"dateModified":11,"author":137,"publisher":141,"about":145,"mainEntityOfPage":149,"articleSection":152,"keywords":153},"https:\u002F\u002Fschema.org","TechArticle",{"@type":138,"name":139,"url":140},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":138,"name":139,"url":140,"logo":142},{"@type":143,"url":144},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":146,"name":6,"description":147,"additionalType":148},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":150,"@id":151},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-3748","Cybersecurity","CVE-2021-3748, CVE-2021-3748 vulnerability, CVE-2021-3748 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[155,164,172,182,188],{"Operator":25,"Negate":25,"Nodes":156},[157],{"Operator":158,"Negate":25,"CPEMatch":159},"OR",[160],{"Vulnerable":4,"Criteria":45,"MatchCriteriaID":161,"VersionStartExcluding":25,"VersionStartIncluding":162,"VersionEndExcluding":163,"VersionEndIncluding":25},"69067884-3C1C-4933-8955-489BC2EB5BD5","0.10.0","6.2.0",{"Operator":25,"Negate":25,"Nodes":165},[166],{"Operator":158,"Negate":25,"CPEMatch":167},[168,170],{"Vulnerable":4,"Criteria":50,"MatchCriteriaID":169,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"DEECE5FC-CACF-4496-A3E7-164736409252",{"Vulnerable":4,"Criteria":53,"MatchCriteriaID":171,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",{"Operator":25,"Negate":25,"Nodes":173},[174],{"Operator":158,"Negate":25,"CPEMatch":175},[176,178,180],{"Vulnerable":4,"Criteria":58,"MatchCriteriaID":177,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",{"Vulnerable":4,"Criteria":61,"MatchCriteriaID":179,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"902B8056-9E37-443B-8905-8AA93E2447FB",{"Vulnerable":4,"Criteria":64,"MatchCriteriaID":181,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"AAE4D2D0-CEEB-416F-8BC5-A7987DF56190",{"Operator":25,"Negate":25,"Nodes":183},[184],{"Operator":158,"Negate":25,"CPEMatch":185},[186],{"Vulnerable":4,"Criteria":69,"MatchCriteriaID":187,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"A930E247-0B43-43CB-98FF-6CE7B8189835",{"Operator":25,"Negate":25,"Nodes":189},[190],{"Operator":158,"Negate":25,"CPEMatch":191},[192,194],{"Vulnerable":4,"Criteria":74,"MatchCriteriaID":193,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"3AA08768-75AF-4791-B229-AE938C780959",{"Vulnerable":4,"Criteria":78,"MatchCriteriaID":195,"VersionStartExcluding":25,"VersionStartIncluding":25,"VersionEndExcluding":25,"VersionEndIncluding":25},"04F853F5-C907-48A3-BDED-2AC3923E4010",[],[],{"lastModified":11,"cacheTime":199,"version":31},1792264994434,{"score":201,"band":202,"action":203,"scoredAt":204},46,"Medium","Plan remediation","2026-10-16T06:53:52.984647+00:00"]