UnratedFix available
hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.15.216, 6.1.183, 6.12.103, 6.18.44, 6.6.151, 7.1.8
- CVEs
- CVE-2026-74546
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 13:20 UTC · Revision 1
Source evidence
hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
core-osv · Original sourcePublished 15 Aug 2026, 12:27 UTC
In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once.
osv:CVE-2026-74546
Kernel
Fixed versions: 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8
Complete source record
{
"id": "fb559b3514e5c02632dadcc86ab849ae2540bcaae79faf4399b390b91fbe4ac4",
"url": "https://osv.dev/vulnerability/CVE-2026-74546",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read",
"summary": "In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once.",
"evidence": "osv:CVE-2026-74546",
"products": [
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"prerequisites": [],
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"severity": "unknown",
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"aliases": [
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"package": {
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],
"modified": "2026-10-28T02:30:35.536216133Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba",
"https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3",
"https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d",
"https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51",
"https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33",
"https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec",
"https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74546.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-74546",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74546.json"
}
},
"related_cves": [
{
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"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 502982,
"published_at": "2026-08-15T12:27:55.147+00:00"
}