Bug 2502385 (CVE-2026-63931)

Summary: CVE-2026-63931 kernel: iio: chemical: scd30: fix division by zero in write_raw
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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.
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Description OSIDB Bzimport 2026-07-19 16:05:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iio: chemical: scd30: fix division by zero in write_raw

Add a zero check for val2 before using it as a divisor when setting the
sampling frequency. A user writing a zero fractional part to the
sampling_frequency sysfs attribute triggers a division by zero in the
kernel.
Comment 1 Keith Grant 2026-07-21 21:39:50 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071950-CVE-2026-63931-1154@gregkh/T