SB20261022273 - Improper input validation in Linux kernel iio adc driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-98678)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to trigger undefined arithmetic behavior that may disrupt ADC driver operation.

The vulnerability exists due to improper input validation in the ad4030_set_avg_frame_len() function of the Linux kernel AD4030 ADC driver when configuring the oversampling ratio. A local privileged user can supply a zero or negative value to cause ilog2() to process an invalid input before validation, producing an undefined result that may disrupt driver operation.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6b0cc4e32599f59c994a60743f53fc72cb2979f4
• https://git.kernel.org/stable/c/6ca6dcbaa68c5e6dc4df171a32c5822e1a4c66c1
• https://git.kernel.org/stable/c/d615210564205993e8f0e7ccb57cc2e66b7d5706