{"id":"CVE-2021-47289","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: fix NULL pointer dereference\n\nCommit 71f642833284 (\"ACPI: utils: Fix reference counting in\nfor_each_acpi_dev_match()\") started doing \"acpi_dev_put()\" on a pointer\nthat was possibly NULL.  That fails miserably, because that helper\ninline function is not set up to handle that case.\n\nJust make acpi_dev_put() silently accept a NULL pointer, rather than\ncalling down to put_device() with an invalid offset off that NULL\npointer.","modified":"2026-03-13T05:19:25.771548Z","published":"2024-05-21T15:15:16.950Z","related":["ALSA-2024:7000","ALSA-2024:7001","SUSE-SU-2024:2010-1","SUSE-SU-2024:2183-1","SUSE-SU-2024:2185-1","SUSE-SU-2024:3189-1","SUSE-SU-2024:3251-1","SUSE-SU-2024:3252-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4"},{"type":"FIX","url":"https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4"},{"type":"FIX","url":"https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.4.139"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.57"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.13.6"}]},{"events":[{"introduced":"0"},{"last_affected":"5.14-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.14-rc2"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47289.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"}]}