{"api_version":"1","generated_at":"2026-08-16T21:43:26+00:00","cve":"CVE-2026-74547","urls":{"html":"https://cve.report/CVE-2026-74547","api":"https://cve.report/api/cve/CVE-2026-74547.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74547","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74547"},"summary":{"title":"hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix busy-loop and I2C flooding in update thread\n\nWhen userspace configures 'auto_update_interval' to 0 via sysfs, the\nbackground kthread executes schedule_timeout_interruptible(0), which\nreturns immediately.\n\nIf 'num_temp_sensors' is concurrently or previously set to 0, the\nmsleep_interruptible() delay inside adt7470_read_temperatures() also\nbecomes 0. This combination forces the background thread into a tight,\nunbounded busy-loop, hogging the CPU and flooding the I2C bus with a\ncontinuous stream of transactions.\n\nFix this vulnerability by raising the lower limit of the clamp_val in\nauto_update_interval_store() from 0 to 500 milliseconds. This guarantees\na reasonable minimum sleep window between sensor updates, protecting the\nsystem from intentional or accidental I2C bus denial of service.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:18:00","updated_at":"2026-08-15 13:18:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17a","name":"https://git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3","name":"https://git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34c","name":"https://git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207c","name":"https://git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408a","name":"https://git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74547","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74547","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 89fac11cb3e7c5860c425dba14845c09ccede39d 1a42bd72a66205e439db1d1142442b62d393408a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 89fac11cb3e7c5860c425dba14845c09ccede39d 38e6b5ce5794ff09442231cc171c2be5e900bab3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 89fac11cb3e7c5860c425dba14845c09ccede39d 82d65f7ef11edcea0228745440b8b4b1f222c34c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 89fac11cb3e7c5860c425dba14845c09ccede39d 5ea299c3aa42a827f6a863eeead6de3525bbb17a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 89fac11cb3e7c5860c425dba14845c09ccede39d cb0b7f9c43b0abbd422a7e4c2c85e91db429207c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.29","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.29 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc6 * 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/adt7470.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1a42bd72a66205e439db1d1142442b62d393408a","status":"affected","version":"89fac11cb3e7c5860c425dba14845c09ccede39d","versionType":"git"},{"lessThan":"38e6b5ce5794ff09442231cc171c2be5e900bab3","status":"affected","version":"89fac11cb3e7c5860c425dba14845c09ccede39d","versionType":"git"},{"lessThan":"82d65f7ef11edcea0228745440b8b4b1f222c34c","status":"affected","version":"89fac11cb3e7c5860c425dba14845c09ccede39d","versionType":"git"},{"lessThan":"5ea299c3aa42a827f6a863eeead6de3525bbb17a","status":"affected","version":"89fac11cb3e7c5860c425dba14845c09ccede39d","versionType":"git"},{"lessThan":"cb0b7f9c43b0abbd422a7e4c2c85e91db429207c","status":"affected","version":"89fac11cb3e7c5860c425dba14845c09ccede39d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwmon/adt7470.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc6","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc6","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix busy-loop and I2C flooding in update thread\n\nWhen userspace configures 'auto_update_interval' to 0 via sysfs, the\nbackground kthread executes schedule_timeout_interruptible(0), which\nreturns immediately.\n\nIf 'num_temp_sensors' is concurrently or previously set to 0, the\nmsleep_interruptible() delay inside adt7470_read_temperatures() also\nbecomes 0. This combination forces the background thread into a tight,\nunbounded busy-loop, hogging the CPU and flooding the I2C bus with a\ncontinuous stream of transactions.\n\nFix this vulnerability by raising the lower limit of the clamp_val in\nauto_update_interval_store() from 0 to 500 milliseconds. This guarantees\na reasonable minimum sleep window between sensor updates, protecting the\nsystem from intentional or accidental I2C bus denial of service."}],"providerMetadata":{"dateUpdated":"2026-08-15T12:27:55.777Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408a"},{"url":"https://git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3"},{"url":"https://git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34c"},{"url":"https://git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17a"},{"url":"https://git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207c"}],"title":"hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74547","datePublished":"2026-08-15T12:27:55.777Z","dateReserved":"2026-08-15T05:44:03.915Z","dateUpdated":"2026-08-15T12:27:55.777Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:18:00","lastModifiedDate":"2026-08-15 13:18:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74547","Ordinal":"1","Title":"hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread","CVE":"CVE-2026-74547","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74547","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix busy-loop and I2C flooding in update thread\n\nWhen userspace configures 'auto_update_interval' to 0 via sysfs, the\nbackground kthread executes schedule_timeout_interruptible(0), which\nreturns immediately.\n\nIf 'num_temp_sensors' is concurrently or previously set to 0, the\nmsleep_interruptible() delay inside adt7470_read_temperatures() also\nbecomes 0. This combination forces the background thread into a tight,\nunbounded busy-loop, hogging the CPU and flooding the I2C bus with a\ncontinuous stream of transactions.\n\nFix this vulnerability by raising the lower limit of the clamp_val in\nauto_update_interval_store() from 0 to 500 milliseconds. This guarantees\na reasonable minimum sleep window between sensor updates, protecting the\nsystem from intentional or accidental I2C bus denial of service.","Type":"Description","Title":"hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread"}]}}}