IT

Tracker / CVE-2025-38481

CVE-2025-38481

Medium 5.5

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.

Affected products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 2.6.29 → 5.4.297
linux linux_kernel · 5.11 → 5.15.190
linux linux_kernel · 5.16 → 6.1.147
linux linux_kernel · 5.5 → 5.10.241
linux linux_kernel · 6.13 → 6.15.8
linux linux_kernel · 6.2 → 6.6.100
linux linux_kernel · 6.7 → 6.12.40

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References