CVE-2025-38529
comedi: aio_iiro_16: Fix bit shift out of bounds
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/43ddd82e6a91913cea1c078e782afd8de60c3a53
- https://git.kernel.org/stable/c/5ac7c60439236fb691b8c7987390e2327bbf18fa
- https://git.kernel.org/stable/c/66acb1586737a22dd7b78abc63213b1bcaa100e4
- https://git.kernel.org/stable/c/955e8835855fed8e87f7d8c8075564a1746c1b4c
- https://git.kernel.org/stable/c/a88692245c315bf8e225f205297a6f4b13d6856a
References (10)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
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