CVE-2025-38482 Information

Jul 29, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

comedi: das6402: Fix bit shift out of bounds

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

/ IRQs 23567 101115 are valid for nhanced\ mode /
if ((1 << it->options[1]) & 0x8cec)

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 [115]. The value 0 explicitly disables the use of interrupts.

Reference

https://git.kernel.org/stable/c/3eab654f5d199ecd45403c6588cda63e491fcfca https://git.kernel.org/stable/c/4a3c18cde02e35aba87e0ad5672b3e1c72dda5a4 https://git.kernel.org/stable/c/70f2b28b5243df557f51c054c20058ae207baaac https://git.kernel.org/stable/c/8a3637027ceeba4ca5e500b23cb7d24c25592513 https://git.kernel.org/stable/c/a18a42e77545afcacd6a2b8d9fc16191b87454df

CNNVD-202507-3449 (Published: 2025-07-28)

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