CVE-2025-38529

comedi: aio_iiro_16: Fix bit shift out of bounds

State: Published
Severity: Not scored
Published: Aug 16, 2025
Updated: May 11, 2026
Reserved: Apr 16, 2025

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ad7a370c8be47247f68f7187cc82f4f25a347116 to before a88692245c315bf8e225f205297a6f4b13d6856aAffected ad7a370c8be47247f68f7187cc82f4f25a347116 to before 5ac7c60439236fb691b8c7987390e2327bbf18faAffected ad7a370c8be47247f68f7187cc82f4f25a347116 to before c593215385f0c0163015cca4512ed3ff42875d19Affected ad7a370c8be47247f68f7187cc82f4f25a347116 to before ff30dd3f15f443d2a0085b12ec2cc95d44f35fa7Affected ad7a370c8be47247f68f7187cc82f4f25a347116 to before 955e8835855fed8e87f7d8c8075564a1746c1b4cAffected ad7a370c8be47247f68f7187cc82f4f25a347116 to before e0f3c0867d7d231c70984f05c97752caacd0dabaAffected ad7a370c8be47247f68f7187cc82f4f25a347116 to before 43ddd82e6a91913cea1c078e782afd8de60c3a53Affected ad7a370c8be47247f68f7187cc82f4f25a347116 to before 66acb1586737a22dd7b78abc63213b1bcaa100e4Affected
LinuxLinux	4.0Affected before 4.0Not affected 5.4.297 through 5.4.Not affected 5.10.241 through 5.10.Not affected 5.15.190 through 5.15.Not affected 6.1.147 through 6.1.Not affected 6.6.100 through 6.6.Not affected 6.12.40 through 6.12.Not affected 6.15.8 through 6.15.*Not affected 6.16 and laterNot affected

Product

Versions

LinuxLinux

ad7a370c8be47247f68f7187cc82f4f25a347116 to before a88692245c315bf8e225f205297a6f4b13d6856aAffected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before 5ac7c60439236fb691b8c7987390e2327bbf18faAffected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before c593215385f0c0163015cca4512ed3ff42875d19Affected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before ff30dd3f15f443d2a0085b12ec2cc95d44f35fa7Affected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before 955e8835855fed8e87f7d8c8075564a1746c1b4cAffected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before e0f3c0867d7d231c70984f05c97752caacd0dabaAffected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before 43ddd82e6a91913cea1c078e782afd8de60c3a53Affected
ad7a370c8be47247f68f7187cc82f4f25a347116 to before 66acb1586737a22dd7b78abc63213b1bcaa100e4Affected

LinuxLinux

4.0Affected
before 4.0Not affected
5.4.297 through 5.4.*Not affected
5.10.241 through 5.10.*Not affected
5.15.190 through 5.15.*Not affected
6.1.147 through 6.1.*Not affected
6.6.100 through 6.6.*Not affected
6.12.40 through 6.12.*Not affected
6.15.8 through 6.15.*Not affected
6.16 and laterNot affected

References

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