{"id":"CVE-2021-47385","state":"PUBLISHED","title":"hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (w83792d) 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 >> 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 multipline alignment]","publishedAt":"2024-05-21T15:03:45.615Z","updatedAt":"2026-05-11T13:53:40.149Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f64211151db4269341ee6432ce832ae3756725ad","status":"affected","lessThan":"200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1","versionType":"git"},{"version":"f64211151db4269341ee6432ce832ae3756725ad","status":"affected","lessThan":"1499bb2c3a87a2efea0065adab2bd66badee61c3","versionType":"git"},{"version":"f64211151db4269341ee6432ce832ae3756725ad","status":"affected","lessThan":"24af1fe376e22c42238a4a604d31e46c486876c3","versionType":"git"},{"version":"f64211151db4269341ee6432ce832ae3756725ad","status":"affected","lessThan":"0f36b88173f028e372668ae040ab1a496834d278","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/w83792d.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.4.151","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.71","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.10","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/w83792d.c"]}],"references":["https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1","https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3","https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3","https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47385.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47385","state":"PUBLISHED","datePublished":"2024-05-21T15:03:45.615Z","dateUpdated":"2026-05-11T13:53:40.149Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:58:30.813Z"},"containers":{"cna":{"title":"hwmon: 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