{"id":"CVE-2021-47386","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field\n\nIf driver read val value sufficient for\n(val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val \u003e\u003e 4) & 0x7))\nfrom device then Null pointer dereference occurs.\n(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)\nAlso lm75[] does not serve a purpose anymore after switching to\ndevm_i2c_new_dummy_device() in w83791d_detect_subclients().\n\nThe patch fixes possible NULL pointer dereference by removing lm75[].\n\nFound by Linux Driver Verification project (linuxtesting.org).\n\n[groeck: Dropped unnecessary continuation lines, fixed multi-line alignment]","modified":"2026-03-15T22:43:12.212105Z","published":"2024-05-21T15:15:24.117Z","related":["ALSA-2024:7000","ALSA-2024:7001","SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8"},{"type":"FIX","url":"https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4"},{"type":"FIX","url":"https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c"},{"type":"FIX","url":"https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47386.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.4.151"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.71"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.14.10"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc3"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}