{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47386","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-21T14:58:30.813Z","datePublished":"2024-05-21T15:03:46.274Z","dateUpdated":"2025-06-19T12:56:11.291Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-06-19T12:56:11.291Z"},"descriptions":[{"lang":"en","value":"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 >> 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]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/w83791d.c"],"versions":[{"version":"358d2071100d84cfe6ef4a9d70ac0d998a1d501e","lessThan":"44d3c480e4e2a75bf6296a18b4356157991ccd80","status":"affected","versionType":"git"},{"version":"358d2071100d84cfe6ef4a9d70ac0d998a1d501e","lessThan":"516d9055039017a20a698103be2b556b4c976bb8","status":"affected","versionType":"git"},{"version":"358d2071100d84cfe6ef4a9d70ac0d998a1d501e","lessThan":"16887ae4e3defd2c4e7913b6c539f33eaf4eac5c","status":"affected","versionType":"git"},{"version":"358d2071100d84cfe6ef4a9d70ac0d998a1d501e","lessThan":"943c15ac1b84d378da26bba41c83c67e16499ac4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/w83791d.c"],"versions":[{"version":"5.4","status":"affected"},{"version":"0","lessThan":"5.4","status":"unaffected","versionType":"semver"},{"version":"5.4.151","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.71","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.10","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.4.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.71"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.14.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80"},{"url":"https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8"},{"url":"https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c"},{"url":"https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4"}],"title":"hwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-476","lang":"en","description":"CWE-476 NULL Pointer Dereference"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-05-28T18:28:32.870309Z","id":"CVE-2021-47386","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-13T18:21:04.770Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.316Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/44d3c480e4e2a75bf6296a18b4356157991ccd80","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/516d9055039017a20a698103be2b556b4c976bb8","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/16887ae4e3defd2c4e7913b6c539f33eaf4eac5c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/943c15ac1b84d378da26bba41c83c67e16499ac4","tags":["x_transferred"]}]}]}}