CVE-2026-18414 Zephyr ADC - Buffer Overflow

Zephyr ADC API in drivers/adc/adc_max32.c contains a buffer overflow caused by incorrect buffer size validation in start_read(), letting unprivileged user-mode threads cause kernel memory corruption, exploit requires user-mode access to MAX32 ADC device.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Privilege Escalation, Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
28 September 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to a version including the fix that uses adc_sequence_validate_buffer() with correct sample size validation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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