{"id":"CVE-2021-47384","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field\n\nIf driver read tmp value sufficient for\n(tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp \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 alignments]","modified":"2026-03-14T14:51:52.592304Z","published":"2024-05-21T15:15:23.947Z","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/6cb01fe630eaffc5a2c3f7364436caddba286623"},{"type":"FIX","url":"https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fc"},{"type":"FIX","url":"https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616"},{"type":"FIX","url":"https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47384.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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}