CVE-2025-38481 - Linux Kernel Comedi Invalid Arg Error Vulnerability

CVE-2025-38481 - Linux Kernel Comedi Invalid Arg Error Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Mon, 07/28/2025 - 17:32
CVE ID : CVE-2025-38481
Published : July 28, 2025, 12:15 p.m. | 1 hour, 59 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large The handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to hold the array of `struct comedi_insn`, getting the length from the `n_insns` member of the `struct comedi_insnlist` supplied by the user. The allocation will fail with a WARNING and a stack dump if it is too large. Avoid that by failing with an `-EINVAL` error if the supplied `n_insns` value is unreasonable. Define the limit on the `n_insns` value in the `MAX_INSNS` macro. Set this to the same value as `MAX_SAMPLES` (65536), which is the maximum allowed sum of the values of the member `n` in the array of `struct comedi_insn`, and sensible comedi instructions will have an `n` of at least 1.
Severity: 0.0 | NA
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