CVE-2026-63966: iio: imu: adis16550: fix stack leak in trigger handler

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-19 · updated 2026-10-30
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: iio: imu: adis16550: fix stack leak in trigger handler adis16550_trigger_handler() declares the scan data array on the stack without initializing it. The memcpy() at the bottom fills only the first 28 bytes (TEMP + 6 channels of GYRO/ACCEL data), and iio_push_to_buffers_with_timestamp() writes the s64 timestamp at the 8-byte-aligned offset 32. Bytes 28-31 remain uninitialized stack data which leaks to userspace on ever trigger. Fix this all by just zero-initializing the structure on the stack.

Affected products

Linux kernel: from 6.15.1 before 6.18.35; from 6.19 before 7.0.12; 6.15-rc6, 6.15-rc7, 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4 (+1); 6.15 — fixed in 6.18.35, 7.0.12
Linux kernel: 6.15 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 6.18.35, 7.0.12; Linux kernel 7.1. Check the vendor advisory for mitigations.

References

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