CVE-2026-63935
Low risk· EPSS 9%Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
In the NXP SAR ADC driver in the Linux kernel, there is no validation of the sampling frequency value before using it as a divisor. Writing zero or a negative value to the sampling_frequency sysfs attribute triggers a division by zero. Additionally, when the computed cycle count is smaller than NXP_SAR_ADC_CONV_TIME, an unsigned integer underflow occurs, wrapping inpsamp to a huge value.
Risk Assessment
An attacker with local access can cause a kernel panic via division by zero, leading to denial of service (DoS). The integer underflow may result in unpredictable driver behavior.
Recommendation
Immediately update the Linux kernel to a version containing the fix that validates the sampling frequency. If updating is not possible, restrict access to the sampling_frequency attribute for unprivileged users.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: iio: adc: nxp-sar-adc: fix division by zero in write_raw Add a validation check for the sampling frequency value before using it as a divisor. A user writing zero or a negative value to the sampling_frequency sysfs attribute triggers a division by zero in the kernel. Also prevent unsigned integer underflow when the computed cycle count is smaller than NXP_SAR_ADC_CONV_TIME, which would wrap the u32 inpsamp to a huge value.