{"schemaVersion":3,"id":"USN-4979-1","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\nKiyin (尹亮) discovered that the NFC LLCP protocol implementation in the\nLinux kernel contained a reference counting error. A local attacker could\nuse this to cause a denial of service (system crash). (CVE-2020-25670)\n\nKiyin (尹亮) discovered that the NFC LLCP protocol implementation in the\nLinux kernel did not properly deallocate memory in certain error\nsituations. A local attacker could use this to cause a denial of service\n(memory exhaustion). (CVE-2020-25671, CVE-2020-25672)\n\nKiyin (尹亮) discovered that the NFC LLCP protocol implementation in the\nLinux kernel did not properly handle error conditions in some situations,\nleading to an infinite loop. A local attacker could use this to cause a\ndenial of service. (CVE-2020-25673)\n\nIt was discovered that the Realtek RTL8188EU Wireless device driver in the\nLinux kernel did not properly validate ssid lengths in some situations. An\nattacker could use this to cause a denial of service (system crash).\n(CVE-2021-28660)\n\nZygo Blaxell discovered that the btrfs file system implementation in the\nLinux kernel contained a race condition during certain cloning operations.\nA local attacker could possibly use this to cause a denial of service\n(system crash). (CVE-2021-28964)\n\nVince Weaver discovered that the perf subsystem in the Linux kernel did not\nproperly handle certain PEBS records properly for some Intel Haswell\nprocessors. A local attacker could use this to cause a denial of service\n(system crash). (CVE-2021-28971)\n\nIt was discovered that the RPA PCI Hotplug driver implementation in the\nLinux kernel did not properly handle device name writes via sysfs, leading\nto a buffer overflow. A privileged attacker could use this to cause a\ndenial of service (system crash) or possibly execute arbitrary code.\n(CVE-2021-28972)\n\nIt was discovered that the Qualcomm IPC router implementation in the Linux\nkernel did not properly initialize memory passed to user space. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2021-29647)\n\nDan Carpenter discovered that the block device manager (dm) implementation\nin the Linux kernel contained a buffer overflow in the ioctl for listing\ndevices. A privileged local attacker could use this to cause a denial of\nservice (system crash). (CVE-2021-31916)\n\nIt was discovered that the CIPSO implementation in the Linux kernel did not\nproperly perform reference counting in some situations, leading to use-\nafter-free vulnerabilities. An attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2021-33033)\n\nWolfgang Frisch discovered that the ext4 file system implementation in the\nLinux kernel contained an integer overflow when handling metadata inode\nextents. An attacker could use this to construct a malicious ext4 file\nsystem image that, when mounted, could cause a denial of service (system\ncrash). (CVE-2021-3428)\n\n马哲宇 discovered that the IEEE 1394 (Firewire) nosy packet sniffer driver in\nthe Linux kernel did not properly perform reference counting in some\nsituations, leading to a use-after-free vulnerability. A local attacker\ncould use this to cause a denial of service (system crash) or possibly\nexecute arbitrary code. (CVE-2021-3483)","dates":{"published":"2021-06-04T19:04:17.000Z","modified":"2026-06-29T13:49:11.236Z","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":"< 4.15.0-144.148","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-144.148","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":"< 4.15.0-1103.110","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1103.110","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":"< 4.15.0-1103.110~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1103.110~16.04.1","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":"< 4.15.0-1115.128~14.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1115.128~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1115.128~14.04.1 | < 4.15.0-1115.128~16.04.1","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":"< 4.15.0-1115.128","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1115.128","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":"< 4.15.0-1100.113~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1100.113~16.04.1","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":"< 4.15.0-1100.113","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1100.113","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":"< 4.15.0-144.148~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-144.148~16.04.1","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":"< 4.15.0-1092.94","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1092.94","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":"< 4.15.0-1072.80~16.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.15.0-1072.80","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1072.80~16.04.1 | < 4.15.0-1072.80","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":"< 4.15.0-1086.91","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1086.91","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":"< 4.15.0-1103.112","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1103.112","eol":null,"hubHref":null}],"affectedCount":12,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4979-1","label":"ubuntu.com/security/notices/USN-4979-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-25670","label":"ubuntu.com/security/CVE-2020-25670","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-25671","label":"ubuntu.com/security/CVE-2020-25671","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-25672","label":"ubuntu.com/security/CVE-2020-25672","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-25673","label":"ubuntu.com/security/CVE-2020-25673","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-3428","label":"ubuntu.com/security/CVE-2021-3428","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-3483","label":"ubuntu.com/security/CVE-2021-3483","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-28660","label":"ubuntu.com/security/CVE-2021-28660","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-28964","label":"ubuntu.com/security/CVE-2021-28964","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-28971","label":"ubuntu.com/security/CVE-2021-28971","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-28972","label":"ubuntu.com/security/CVE-2021-28972","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29647","label":"ubuntu.com/security/CVE-2021-29647","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-31916","label":"ubuntu.com/security/CVE-2021-31916","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-33033","label":"ubuntu.com/security/CVE-2021-33033","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2020-25670","CVE-2020-25671","CVE-2020-25672","CVE-2020-25673","CVE-2021-28660","CVE-2021-28964","CVE-2021-28971","CVE-2021-28972","CVE-2021-29647","CVE-2021-31916","CVE-2021-33033","CVE-2021-3428","CVE-2021-3483"],"downstream":[],"duplicates":[],"related":["CVE-2020-25670","CVE-2020-25671","CVE-2020-25672","CVE-2020-25673","CVE-2021-28660","CVE-2021-28964","CVE-2021-28971","CVE-2021-28972","CVE-2021-29647","CVE-2021-31916","CVE-2021-33033","CVE-2021-3428","CVE-2021-3483"]},"timeline":[{"kind":"published","date":"2021-06-04T19:04:17.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-29T13:49:11.236Z","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":"2026-10-22T08:46:49.670Z","stale":false,"partial":false}}