{"id":"USN-5091-2","summary":"linux-raspi, linux-raspi-5.4 vulnerabilities","details":"Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk\ndiscovered that the BPF verifier in the Linux kernel missed possible\nmispredicted branches due to type confusion, allowing a side-channel\nattack. An attacker could use this to expose sensitive information.\n(CVE-2021-33624)\n\nIt was discovered that the tracing subsystem in the Linux kernel did not\nproperly keep track of per-cpu ring buffer state. A privileged attacker\ncould use this to cause a denial of service. (CVE-2021-3679)\n\nIt was discovered that the Virtio console implementation in the Linux\nkernel did not properly validate input lengths in some situations. A local\nattacker could possibly use this to cause a denial of service (system\ncrash). (CVE-2021-38160)\n\nMichael Wakabayashi discovered that the NFSv4 client implementation in the\nLinux kernel did not properly order connection setup operations. An\nattacker controlling a remote NFS server could use this to cause a denial\nof service on the client. (CVE-2021-38199)\n\nIt was discovered that the MAX-3421 host USB device driver in the Linux\nkernel did not properly handle device removal events. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash). (CVE-2021-38204)\n","modified":"2026-02-10T04:42:19Z","published":"2021-09-30T15:51:19Z","related":["UBUNTU-CVE-2021-33624","UBUNTU-CVE-2021-3679","UBUNTU-CVE-2021-38160","UBUNTU-CVE-2021-38199","UBUNTU-CVE-2021-38204"],"upstream":["CVE-2021-33624","CVE-2021-3679","CVE-2021-38160","CVE-2021-38199","CVE-2021-38204","UBUNTU-CVE-2021-33624","UBUNTU-CVE-2021-3679","UBUNTU-CVE-2021-38160","UBUNTU-CVE-2021-38199","UBUNTU-CVE-2021-38204"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5091-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3679"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33624"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-38160"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-38199"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-38204"}],"affected":[{"package":{"name":"linux-raspi-5.4","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/linux-raspi-5.4@5.4.0-1044.48~18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1044.48~18.04.1"}]}],"versions":["5.4.0-1013.13~18.04.1","5.4.0-1015.15~18.04.1","5.4.0-1016.17~18.04.1","5.4.0-1018.20~18.04.1","5.4.0-1019.21~18.04.1","5.4.0-1021.24~18.04.1","5.4.0-1022.25~18.04.1","5.4.0-1023.26~18.04.1","5.4.0-1025.28~18.04.1","5.4.0-1026.29~18.04.1","5.4.0-1028.31~18.04.1","5.4.0-1029.32~18.04.1","5.4.0-1030.33~18.04.1","5.4.0-1032.35~18.04.1","5.4.0-1033.36~18.04.1","5.4.0-1034.37~18.04.1","5.4.0-1035.38~18.04.1","5.4.0-1036.39~18.04.1","5.4.0-1038.41~18.04.1","5.4.0-1041.45~18.04.1","5.4.0-1042.46~18.04.3","5.4.0-1043.47~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-buildinfo-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48~18.04.1"},{"binary_name":"linux-headers-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48~18.04.1"},{"binary_name":"linux-image-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48~18.04.1"},{"binary_name":"linux-modules-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48~18.04.1"},{"binary_name":"linux-raspi-5.4-headers-5.4.0-1044","binary_version":"5.4.0-1044.48~18.04.1"},{"binary_name":"linux-raspi-5.4-tools-5.4.0-1044","binary_version":"5.4.0-1044.48~18.04.1"},{"binary_name":"linux-tools-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48~18.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5091-2.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2021-3679","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2021-33624","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-38160","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-38199","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-38204","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}]}}},{"package":{"name":"linux-raspi","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-raspi@5.4.0-1044.48?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1044.48"}]}],"versions":["5.4.0-1007.7","5.4.0-1008.8","5.4.0-1011.11","5.4.0-1012.12","5.4.0-1013.13","5.4.0-1015.15","5.4.0-1016.17","5.4.0-1018.20","5.4.0-1019.21","5.4.0-1021.24","5.4.0-1022.25","5.4.0-1023.26","5.4.0-1025.28","5.4.0-1026.29","5.4.0-1028.31","5.4.0-1029.32","5.4.0-1030.33","5.4.0-1032.35","5.4.0-1033.36","5.4.0-1034.37","5.4.0-1035.38","5.4.0-1036.39","5.4.0-1038.41","5.4.0-1041.45","5.4.0-1042.46","5.4.0-1043.47"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-buildinfo-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48"},{"binary_name":"linux-headers-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48"},{"binary_name":"linux-image-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48"},{"binary_name":"linux-modules-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48"},{"binary_name":"linux-raspi-headers-5.4.0-1044","binary_version":"5.4.0-1044.48"},{"binary_name":"linux-raspi-tools-5.4.0-1044","binary_version":"5.4.0-1044.48"},{"binary_name":"linux-tools-5.4.0-1044-raspi","binary_version":"5.4.0-1044.48"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5091-2.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2021-3679","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2021-33624","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-38160","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-38199","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-38204","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}]}}}],"schema_version":"1.7.3"}