{"id":"CVE-2021-47207","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: gus: fix null pointer dereference on pointer block\n\nThe pointer block return from snd_gf1_dma_next_block could be\nnull, so there is a potential null pointer dereference issue.\nFix this by adding a null check before dereference.","modified":"2026-03-15T21:45:07.704651Z","published":"2024-04-10T19:15:48.400Z","related":["SUSE-SU-2024:1641-1","SUSE-SU-2024:1642-1","SUSE-SU-2024:1643-1","SUSE-SU-2024:1644-1","SUSE-SU-2024:1645-1","SUSE-SU-2024:1646-1","SUSE-SU-2024:1647-1","SUSE-SU-2024:1650-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1","SUSE-SU-2024:1870-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/cb09c760c201f82df83babc92a5ffea0a01807fc"},{"type":"FIX","url":"https://git.kernel.org/stable/c/16721797dcef2c7c030ffe73a07f39a65f9323c3"},{"type":"FIX","url":"https://git.kernel.org/stable/c/1ac6cd87d8ddd36c43620f82c4d65b058f725f0f"},{"type":"FIX","url":"https://git.kernel.org/stable/c/3e28e083dcdf03a18a083f8a47b6bb6b1604b5be"},{"type":"FIX","url":"https://git.kernel.org/stable/c/542fa721594a02d2aee0370a764d306ef48d030c"},{"type":"FIX","url":"https://git.kernel.org/stable/c/a0d21bb3279476c777434c40d969ea88ca64f9aa"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ab4c1ebc40f699f48346f634d7b72b9c5193f315"},{"type":"FIX","url":"https://git.kernel.org/stable/c/c6d2cefdd05c4810c416fb8d384b5c377bd977bc"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47207.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.4.293"}]},{"events":[{"introduced":"4.5"},{"fixed":"4.9.291"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.256"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.218"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.162"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.82"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.15.5"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}