{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63931", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.021Z", "datePublished": "2026-07-19T14:55:30.718Z", "dateUpdated": "2026-07-19T14:55:30.718Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:55:30.718Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: scd30: fix division by zero in write_raw\n\nAdd a zero check for val2 before using it as a divisor when setting the\nsampling frequency. A user writing a zero fractional part to the\nsampling_frequency sysfs attribute triggers a division by zero in the\nkernel."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iio/chemical/scd30_core.c"], "versions": [{"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "4748bce423a363bb8a85a624faeb8f54fe331611", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "6308b812acdcac38cbfe1af0b1524c3375f408a5", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "c7a740bf75554b051fabb17596ca6e483d6e6d90", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "e85bc501947f5ae16dd9adc01162b76d55ab7962", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "d98c2e69aab905d1b19a69ffe584efa46a9efd42", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "2c50c017df97bfb425038efdfb8514c7bcd08564", "status": "affected", "versionType": "git"}, {"version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "lessThan": "5aba4f94b225617a55fed442a70329b2ee19c0a5", "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/iio/chemical/scd30_core.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.9", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4748bce423a363bb8a85a624faeb8f54fe331611"}, {"url": "https://git.kernel.org/stable/c/6308b812acdcac38cbfe1af0b1524c3375f408a5"}, {"url": "https://git.kernel.org/stable/c/c7a740bf75554b051fabb17596ca6e483d6e6d90"}, {"url": "https://git.kernel.org/stable/c/e85bc501947f5ae16dd9adc01162b76d55ab7962"}, {"url": "https://git.kernel.org/stable/c/d98c2e69aab905d1b19a69ffe584efa46a9efd42"}, {"url": "https://git.kernel.org/stable/c/5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53"}, {"url": "https://git.kernel.org/stable/c/2c50c017df97bfb425038efdfb8514c7bcd08564"}, {"url": "https://git.kernel.org/stable/c/5aba4f94b225617a55fed442a70329b2ee19c0a5"}], "title": "iio: chemical: scd30: fix division by zero in write_raw", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/iio/chemical/scd30_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4748bce423a363bb8a85a624faeb8f54fe331611", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "6308b812acdcac38cbfe1af0b1524c3375f408a5", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "c7a740bf75554b051fabb17596ca6e483d6e6d90", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "e85bc501947f5ae16dd9adc01162b76d55ab7962", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "d98c2e69aab905d1b19a69ffe584efa46a9efd42", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "2c50c017df97bfb425038efdfb8514c7bcd08564", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}, {"lessThan": "5aba4f94b225617a55fed442a70329b2ee19c0a5", "status": "affected", "version": "64b3d8b1b0f5c16c19045785e4da8391ae35ec99", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/iio/chemical/scd30_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"lessThan": "5.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.259", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.210", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.176", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.143", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.93", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.35", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.12", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "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\niio: chemical: scd30: fix division by zero in write_raw\n\nAdd a zero check for val2 before using it as a divisor when setting the\nsampling frequency. A user writing a zero fractional part to the\nsampling_frequency sysfs attribute triggers a division by zero in the\nkernel."}], "id": "CVE-2026-63931", "lastModified": "2026-07-27T17:44:23.777", "metrics": {}, "published": "2026-07-19T16:17:11.507", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c50c017df97bfb425038efdfb8514c7bcd08564"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4748bce423a363bb8a85a624faeb8f54fe331611"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5aba4f94b225617a55fed442a70329b2ee19c0a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6308b812acdcac38cbfe1af0b1524c3375f408a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c7a740bf75554b051fabb17596ca6e483d6e6d90"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d98c2e69aab905d1b19a69ffe584efa46a9efd42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e85bc501947f5ae16dd9adc01162b76d55ab7962"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: iio: chemical: scd30: fix division by zero in write_raw", "id": "2502385", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502385"}, "csaw": false, "cwe": "CWE-369", "details": ["A flaw was found in the Linux kernel's iio: chemical: scd30 driver. A local user can trigger a denial of service (DoS) by writing a zero fractional part to the sampling_frequency sysfs attribute. This action leads to a division-by-zero error within the kernel, causing the system to crash."], "name": "CVE-2026-63931", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63931\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63931\nhttps://lore.kernel.org/linux-cve-announce/2026071950-CVE-2026-63931-1154@gregkh/T"]}