{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74546", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.914Z", "datePublished": "2026-08-15T12:27:55.147Z", "dateUpdated": "2026-08-19T16:38:34.886Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:38:34.886Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read\n\nIf the fan data becomes 0 between the FAN_DATA_VALID() check and the\nFAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash\ndue to a race with a concurrent update of the cached fan value.\n\nFix a TOCTOU issue by reading fan data once."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/adt7470.c"], "versions": [{"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "689a2ea75434131d0af58aeb7d51fde40e858b4d", "status": "affected", "versionType": "git"}, {"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "009240d057e26831cc925feaba4c490209c1d0ba", "status": "affected", "versionType": "git"}, {"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "d328175045176f85c15c369bd21dc551351e7935", "status": "affected", "versionType": "git"}, {"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "832069bec79cf6f903441c5769d3cdba95d0af33", "status": "affected", "versionType": "git"}, {"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "96ad57d31763559d376416cdf3bf5ae79bbbebec", "status": "affected", "versionType": "git"}, {"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "76963b04b2d1c648d69949d8dd521e1ff7f40b51", "status": "affected", "versionType": "git"}, {"version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "lessThan": "1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3", "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/adt7470.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.15", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d"}, {"url": "https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba"}, {"url": "https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935"}, {"url": "https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33"}, {"url": "https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec"}, {"url": "https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51"}, {"url": "https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"}], "title": "hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"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": "689a2ea75434131d0af58aeb7d51fde40e858b4d", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "versionType": "git"}, {"lessThan": "009240d057e26831cc925feaba4c490209c1d0ba", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "versionType": "git"}, {"lessThan": "d328175045176f85c15c369bd21dc551351e7935", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "versionType": "git"}, {"lessThan": "832069bec79cf6f903441c5769d3cdba95d0af33", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "versionType": "git"}, {"lessThan": "96ad57d31763559d376416cdf3bf5ae79bbbebec", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "versionType": "git"}, {"lessThan": "76963b04b2d1c648d69949d8dd521e1ff7f40b51", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "versionType": "git"}, {"lessThan": "1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3", "status": "affected", "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f", "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": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read\n\nIf the fan data becomes 0 between the FAN_DATA_VALID() check and the\nFAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash\ndue to a race with a concurrent update of the cached fan value.\n\nFix a TOCTOU issue by reading fan data once."}], "id": "CVE-2026-74546", "lastModified": "2026-08-19T17:21:09.453", "metrics": {}, "published": "2026-08-15T13:17:59.950", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read", "id": "2516975", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516975"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-369", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nhwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read\nIf the fan data becomes 0 between the FAN_DATA_VALID() check and the\nFAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash\ndue to a race with a concurrent update of the cached fan value.\nFix a TOCTOU issue by reading fan data once.", "A flaw was found in the Linux kernel's hwmon (hardware monitoring) subsystem, specifically within the adt7470 driver. A local attacker could exploit a time-of-check to time-of-use (TOCTOU) race condition. If fan data becomes zero between a validation check and a conversion operation, it can lead to a divide-by-zero error, causing a system crash and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-74546", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74546\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74546\nhttps://lore.kernel.org/linux-cve-announce/2026081549-CVE-2026-74546-f2c9@gregkh/T"], "threat_severity": "Low"}