CVE-2026-98678
Received Received - Intake

Invalid Oversampling Ratio Validation in Linux Kernel IIO ADC AD4030 Driver

Publication date: 2026-10-18

Last updated on: 2026-10-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad4030: fix invalid oversampling_ratio validation In ad4030_set_avg_frame_len(), the logarithm is calculated before input validation. Passing zero or negative values leads to an undefined result from ilog2(). Validate that the input is strictly positive prior to computing its logarithm.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-18
Last Modified
2026-10-18
Generated
2026-10-18
AI Q&A
2026-10-18
EPSS Evaluated
N/A
NVD
CVE-2026-98678
EUVD
EUVD-2026-103932

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
Linux Linux 949abd1ca5a4342d9fb8c774035222e65dd1cfe4
Linux Linux 949abd1ca5a4342d9fb8c774035222e65dd1cfe4
Linux Linux 949abd1ca5a4342d9fb8c774035222e65dd1cfe4
Linux Linux 6.15

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is in the Linux kernel's IIO ADC driver for the AD4030 device. The issue occurs in the function ad4030_set_avg_frame_len() where the logarithm of a value is calculated before validating the input. If zero or negative values are passed, the ilog2() function returns an undefined result, potentially causing unexpected behavior or system instability.

Impact Analysis

This vulnerability could allow an attacker with local access to cause undefined behavior in the kernel by triggering invalid input values. This might lead to system crashes, data corruption, or privilege escalation. However, exploitation requires specific conditions and is not remotely exploitable.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-98678. The vulnerability affects the ad4030 ADC driver, so ensure the driver is updated through standard kernel updates.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-98678. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart