{"id":"USN-4947-1","summary":"linux-oem-5.6 vulnerabilities","details":"Kiyin (尹亮) discovered that the x25 implementation in the Linux kernel\ncontained overflows when handling addresses from user space. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2020-35519)\n\nIt was discovered that the fastrpc driver in the Linux kernel did not\nprevent user space applications from sending kernel RPC messages. A local\nattacker could possibly use this to gain elevated privileges.\n(CVE-2021-28375)\n\nIt was discovered that the TIPC protocol implementation in the Linux kernel\ndid not properly validate passed encryption key sizes. A local attacker\ncould use this to cause a denial of service (system crash).\n(CVE-2021-29646)\n\nIt was discovered that a race condition existed in the netfilter subsystem\nof the Linux kernel when replacing tables. A local attacker could use this\nto cause a denial of service (system crash). (CVE-2021-29650)\n\nArnd Bergmann discovered that the video4linux subsystem in the Linux kernel\ndid not properly deallocate memory in some situations. A local attacker\ncould use this to cause a denial of service (memory exhaustion).\n(CVE-2021-30002)\n","modified":"2026-02-10T04:42:10Z","published":"2021-05-11T21:41:11Z","related":["UBUNTU-CVE-2020-35519","UBUNTU-CVE-2021-28375","UBUNTU-CVE-2021-29646","UBUNTU-CVE-2021-29650","UBUNTU-CVE-2021-30002"],"upstream":["CVE-2020-35519","CVE-2021-28375","CVE-2021-29646","CVE-2021-29650","CVE-2021-30002","UBUNTU-CVE-2020-35519","UBUNTU-CVE-2021-28375","UBUNTU-CVE-2021-29646","UBUNTU-CVE-2021-29650","UBUNTU-CVE-2021-30002"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4947-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-35519"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28375"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29646"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29650"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-30002"}],"affected":[{"package":{"name":"linux-oem-5.6","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1056.60?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.0-1056.60"}]}],"versions":["5.6.0-1007.7","5.6.0-1008.8","5.6.0-1010.10","5.6.0-1011.11","5.6.0-1013.13","5.6.0-1017.17","5.6.0-1018.18","5.6.0-1020.20","5.6.0-1021.21","5.6.0-1023.23","5.6.0-1026.26","5.6.0-1027.27","5.6.0-1028.28","5.6.0-1031.32","5.6.0-1032.33","5.6.0-1033.35","5.6.0-1034.36","5.6.0-1035.37","5.6.0-1036.39","5.6.0-1039.43","5.6.0-1042.46","5.6.0-1047.51","5.6.0-1048.52","5.6.0-1050.54","5.6.0-1052.56","5.6.0-1053.57","5.6.0-1054.58","5.6.0-1055.59"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"5.6.0-1056.60","binary_name":"linux-buildinfo-5.6.0-1056-oem"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-headers-5.6.0-1056-oem"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-image-unsigned-5.6.0-1056-oem"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-modules-5.6.0-1056-oem"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-oem-5.6-headers-5.6.0-1056"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-oem-5.6-tools-5.6.0-1056"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-oem-5.6-tools-host"},{"binary_version":"5.6.0-1056.60","binary_name":"linux-tools-5.6.0-1056-oem"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-35519"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-28375"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29646"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29650"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-30002"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4947-1.json"}}],"schema_version":"1.7.3"}