{"api_version":"1","generated_at":"2026-08-22T18:31:25+00:00","cve":"CVE-2026-74711","urls":{"html":"https://cve.report/CVE-2026-74711","api":"https://cve.report/api/cve/CVE-2026-74711.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74711","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74711"},"summary":{"title":"hwmon: (pmbus) Fix type confusion in notification logic","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus) Fix type confusion in notification logic\n\nSashiko reports:\n\nAt the start of the loop in pmbus_notify(), the code unconditionally casts\nevery attribute to a struct sensor_device_attribute:\n\ndrivers/hwmon/pmbus/pmbus_core.c:pmbus_notify() {\n    for (i = 0; i < data->num_attributes; i++) {\n        struct device_attribute *da = to_dev_attr(data->group.attrs[i]);\n        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);\n        int index = attr->index;\n...\n}\n\nHowever, data->group.attrs can contain other types like struct\npmbus_samples_reg or struct pmbus_sensor, which only embed a base\nstruct device_attribute.\n\nIf da is a struct pmbus_samples_reg, dev_attr is the last member. Casting\nit to struct sensor_device_attribute and reading the index field appears\nto access memory past the end of the allocation, which might trigger a\nslab-out-of-bounds read.\n\nAdditionally, if da is a struct pmbus_sensor, casting it causes the index\nfield to overlap with the page, phase, and reg fields. Could this produce\na garbage mask on little-endian systems that spuriously matches the target\nreg, page, and flags during an alert?\n\nFix the problem by using struct sensor_device_attr in struct pmbus_sensor\nand struct pmbus_label. Since those attributes never trigger a\nnotification, set the value of attr->index to -1 for them. Use this value\nto distinguish from boolean attributes which _can_ trigger a notification\nand use the index field to encode mask, page, and register values.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:45","updated_at":"2026-08-22 16:16:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/59bd68ab05a8f9c9a60b6ec44682084184803ff4","name":"https://git.kernel.org/stable/c/59bd68ab05a8f9c9a60b6ec44682084184803ff4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/821f6416e69782fa662aff94b5ea52c943042790","name":"https://git.kernel.org/stable/c/821f6416e69782fa662aff94b5ea52c943042790","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0b121de89a99c54bcf516999b04e8531c84f08d5","name":"https://git.kernel.org/stable/c/0b121de89a99c54bcf516999b04e8531c84f08d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74711","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74711","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f469bde9afd136598a0c4edc054296e6046f90ee 821f6416e69782fa662aff94b5ea52c943042790 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f469bde9afd136598a0c4edc054296e6046f90ee 0b121de89a99c54bcf516999b04e8531c84f08d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f469bde9afd136598a0c4edc054296e6046f90ee 59bd68ab05a8f9c9a60b6ec44682084184803ff4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hwmon/pmbus/pmbus_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"821f6416e69782fa662aff94b5ea52c943042790","status":"affected","version":"f469bde9afd136598a0c4edc054296e6046f90ee","versionType":"git"},{"lessThan":"0b121de89a99c54bcf516999b04e8531c84f08d5","status":"affected","version":"f469bde9afd136598a0c4edc054296e6046f90ee","versionType":"git"},{"lessThan":"59bd68ab05a8f9c9a60b6ec44682084184803ff4","status":"affected","version":"f469bde9afd136598a0c4edc054296e6046f90ee","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwmon/pmbus/pmbus_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus) Fix type confusion in notification logic\n\nSashiko reports:\n\nAt the start of the loop in pmbus_notify(), the code unconditionally casts\nevery attribute to a struct sensor_device_attribute:\n\ndrivers/hwmon/pmbus/pmbus_core.c:pmbus_notify() {\n    for (i = 0; i < data->num_attributes; i++) {\n        struct device_attribute *da = to_dev_attr(data->group.attrs[i]);\n        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);\n        int index = attr->index;\n...\n}\n\nHowever, data->group.attrs can contain other types like struct\npmbus_samples_reg or struct pmbus_sensor, which only embed a base\nstruct device_attribute.\n\nIf da is a struct pmbus_samples_reg, dev_attr is the last member. Casting\nit to struct sensor_device_attribute and reading the index field appears\nto access memory past the end of the allocation, which might trigger a\nslab-out-of-bounds read.\n\nAdditionally, if da is a struct pmbus_sensor, casting it causes the index\nfield to overlap with the page, phase, and reg fields. Could this produce\na garbage mask on little-endian systems that spuriously matches the target\nreg, page, and flags during an alert?\n\nFix the problem by using struct sensor_device_attr in struct pmbus_sensor\nand struct pmbus_label. Since those attributes never trigger a\nnotification, set the value of attr->index to -1 for them. Use this value\nto distinguish from boolean attributes which _can_ trigger a notification\nand use the index field to encode mask, page, and register values."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:33:07.779Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/821f6416e69782fa662aff94b5ea52c943042790"},{"url":"https://git.kernel.org/stable/c/0b121de89a99c54bcf516999b04e8531c84f08d5"},{"url":"https://git.kernel.org/stable/c/59bd68ab05a8f9c9a60b6ec44682084184803ff4"}],"title":"hwmon: (pmbus) Fix type confusion in notification logic","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74711","datePublished":"2026-08-22T15:33:07.779Z","dateReserved":"2026-08-15T05:44:03.928Z","dateUpdated":"2026-08-22T15:33:07.779Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:45","lastModifiedDate":"2026-08-22 16:16:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74711","Ordinal":"1","Title":"hwmon: (pmbus) Fix type confusion in notification logic","CVE":"CVE-2026-74711","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74711","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus) Fix type confusion in notification logic\n\nSashiko reports:\n\nAt the start of the loop in pmbus_notify(), the code unconditionally casts\nevery attribute to a struct sensor_device_attribute:\n\ndrivers/hwmon/pmbus/pmbus_core.c:pmbus_notify() {\n    for (i = 0; i < data->num_attributes; i++) {\n        struct device_attribute *da = to_dev_attr(data->group.attrs[i]);\n        struct sensor_device_attribute *attr = to_sensor_dev_attr(da);\n        int index = attr->index;\n...\n}\n\nHowever, data->group.attrs can contain other types like struct\npmbus_samples_reg or struct pmbus_sensor, which only embed a base\nstruct device_attribute.\n\nIf da is a struct pmbus_samples_reg, dev_attr is the last member. Casting\nit to struct sensor_device_attribute and reading the index field appears\nto access memory past the end of the allocation, which might trigger a\nslab-out-of-bounds read.\n\nAdditionally, if da is a struct pmbus_sensor, casting it causes the index\nfield to overlap with the page, phase, and reg fields. Could this produce\na garbage mask on little-endian systems that spuriously matches the target\nreg, page, and flags during an alert?\n\nFix the problem by using struct sensor_device_attr in struct pmbus_sensor\nand struct pmbus_label. Since those attributes never trigger a\nnotification, set the value of attr->index to -1 for them. Use this value\nto distinguish from boolean attributes which _can_ trigger a notification\nand use the index field to encode mask, page, and register values.","Type":"Description","Title":"hwmon: (pmbus) Fix type confusion in notification logic"}]}}}