{"id":"CVE-2021-47055","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: require write permissions for locking and badblock ioctls\n\nMEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require\nwrite permission. Depending on the hardware MEMLOCK might even be\nwrite-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK\nis always write-once.\n\nMEMSETBADBLOCK modifies the bad block table.","modified":"2026-03-15T22:42:46.332215Z","published":"2024-02-29T23:15:07.473Z","related":["ALSA-2024:3618","ALSA-2024:3627","SUSE-SU-2024:1454-1","SUSE-SU-2024:1465-1","SUSE-SU-2024:1489-1","SUSE-SU-2024:1643-1","SUSE-SU-2024:1646-1","SUSE-SU-2024:1870-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668"},{"type":"FIX","url":"https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b"},{"type":"FIX","url":"https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf"},{"type":"FIX","url":"https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee"},{"type":"FIX","url":"https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366"},{"type":"FIX","url":"https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981"},{"type":"FIX","url":"https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37"},{"type":"FIX","url":"https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e"},{"type":"FIX","url":"https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"4.4.233"},{"fixed":"4.4.269"}]},{"events":[{"introduced":"4.9.233"},{"fixed":"4.9.269"}]},{"events":[{"introduced":"4.14.194"},{"fixed":"4.14.233"}]},{"events":[{"introduced":"4.19.139"},{"fixed":"4.19.191"}]},{"events":[{"introduced":"5.4.58"},{"fixed":"5.4.119"}]},{"events":[{"introduced":"5.9"},{"fixed":"5.10.37"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.11.21"}]},{"events":[{"introduced":"5.12"},{"fixed":"5.12.4"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47055.json"}}],"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"}]}