CVE-2025-38483
comedi: das16m1: Fix bit shift out of bounds
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Description
In the Linux kernel, the following vulnerability has been resolved: comedi: das16m1: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: /* only irqs 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15 are valid */ 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.
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/076b13ee60eb01ed0d140ef261f95534562a3077
- https://git.kernel.org/stable/c/539bdff832adac9ea653859fa0b6bc62e743329c
- https://git.kernel.org/stable/c/65c03e6fc524eb2868abedffd8a4613d78abc288
- https://git.kernel.org/stable/c/adb7df8a8f9d788423e161b779764527dd3ec2d0
- https://git.kernel.org/stable/c/b3c95fa508e5dc3da60520eea92a5241095ceef1
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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