{"schemaVersion":3,"id":"USN-4883-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities\n\nAdam Nichols discovered that heap overflows existed in the iSCSI subsystem\nin the Linux kernel. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2021-27365)\n\nAdam Nichols discovered that the iSCSI subsystem in the Linux kernel did\nnot properly restrict access to iSCSI transport handles. A local attacker\ncould use this to cause a denial of service or expose sensitive information\n(kernel pointer addresses). (CVE-2021-27363)\n\nAdam Nichols discovered that an out-of-bounds read existed in the iSCSI\nsubsystem in the Linux kernel. A local attacker could use this to cause a\ndenial of service (system crash) or expose sensitive information (kernel\nmemory). (CVE-2021-27364)","dates":{"published":"2021-03-29T16:52:26.000Z","modified":"2026-06-03T13:34:01.415Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"linux","name":"linux","label":"linux","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux","purlType":"deb","versions":[{"text":"< 4.4.0-206.238","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-139.143","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-206.238 | < 4.15.0-139.143","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-aws","name":"linux-aws","label":"linux-aws","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws","purlType":"deb","versions":[{"text":"< 4.4.0-1088.92","noFixRecorded":false,"fixedIn":null},{"text":"< 4.4.0-1124.138","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1096.103","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-1088.92 | < 4.4.0-1124.138 | < 4.15.0-1096.103","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-aws-hwe","name":"linux-aws-hwe","label":"linux-aws-hwe","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws-hwe","purlType":"deb","versions":[{"text":"< 4.15.0-1096.103~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1096.103~16.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure","name":"linux-azure","label":"linux-azure","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure","purlType":"deb","versions":[{"text":"< 4.15.0-1110.122~14.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1110.122~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1110.122~14.04.1 | < 4.15.0-1110.122~16.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure-4.15","name":"linux-azure-4.15","label":"linux-azure-4.15","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure-4.15","purlType":"deb","versions":[{"text":"< 4.15.0-1110.122","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1110.122","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp","name":"linux-gcp","label":"linux-gcp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp","purlType":"deb","versions":[{"text":"< 4.15.0-1095.108~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1095.108~16.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-4.15","name":"linux-gcp-4.15","label":"linux-gcp-4.15","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-4.15","purlType":"deb","versions":[{"text":"< 4.15.0-1095.108","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1095.108","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-hwe","name":"linux-hwe","label":"linux-hwe","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-hwe","purlType":"deb","versions":[{"text":"< 4.15.0-139.143~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-139.143~16.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-kvm","name":"linux-kvm","label":"linux-kvm","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-kvm","purlType":"deb","versions":[{"text":"< 4.4.0-1090.99","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1087.89","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-1090.99 | < 4.15.0-1087.89","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-oracle","name":"linux-oracle","label":"linux-oracle","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-oracle","purlType":"deb","versions":[{"text":"< 4.15.0-1067.75~16.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1067.75","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1067.75~16.04.1 | < 4.15.0-1067.75","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-raspi2","name":"linux-raspi2","label":"linux-raspi2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-raspi2","purlType":"deb","versions":[{"text":"< 4.4.0-1148.158","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1081.86","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-1148.158 | < 4.15.0-1081.86","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-snapdragon","name":"linux-snapdragon","label":"linux-snapdragon","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-snapdragon","purlType":"deb","versions":[{"text":"< 4.4.0-1152.162","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1098.107","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-1152.162 | < 4.15.0-1098.107","eol":null,"hubHref":null}],"affectedCount":12,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4883-1","label":"ubuntu.com/security/notices/USN-4883-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-27363","label":"ubuntu.com/security/CVE-2021-27363","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-27364","label":"ubuntu.com/security/CVE-2021-27364","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-27365","label":"ubuntu.com/security/CVE-2021-27365","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-27363","CVE-2021-27364","CVE-2021-27365"],"downstream":[],"duplicates":[],"related":["CVE-2021-27363","CVE-2021-27364","CVE-2021-27365"]},"timeline":[{"kind":"published","date":"2021-03-29T16:52:26.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-03T13:34:01.415Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T12:12:37.165Z","stale":false,"partial":false}}