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High severity7.1NVD Advisory· Published Aug 16, 2025· Updated Jun 17, 2026

CVE-2025-38529

CVE-2025-38529

Description

In the Linux kernel, the following vulnerability has been resolved:

comedi: aio_iiro_16: Fix bit shift out of bounds

When checking for a supported IRQ number, the following test is used:

if ((1 << it->options[1]) & 0xdcfc) {

However, it->options[i] is an unchecked int value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring it->options[1] to be within bounds before proceeding with the original test. Valid it->options[1] values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.

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Affected products

128

Patches

Vulnerability mechanics

References

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