CVE-2026-74546

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{"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": "2026-11-06T17:19:50.547", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74546", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:59:29.110410Z", "version": "2.0.3"}}]}, "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"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc958a61ff6d34a0ec42744d3ff524ee202b2e9f,d328175045176f85c15c369bd21dc551351e7935)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc958a61ff6d34a0ec42744d3ff524ee202b2e9f,832069bec79cf6f903441c5769d3cdba95d0af33)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc958a61ff6d34a0ec42744d3ff524ee202b2e9f,96ad57d31763559d376416cdf3bf5ae79bbbebec)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc958a61ff6d34a0ec42744d3ff524ee202b2e9f,76963b04b2d1c648d69949d8dd521e1ff7f40b51)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fc958a61ff6d34a0ec42744d3ff524ee202b2e9f,1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.151,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T14:30:10.511551+00:00", "updated": "2026-08-21T23:15:05.352571+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}