DEBIAN-CVE-2025-38481
Record from OSV · Published July 28, 2025
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.
Fixed versions
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| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:12 | 6.1.147-1 |
| linux | Debian:13 | 6.12.41-1 |
| linux | Debian:14 | 6.16.3-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 0, 6.1.106-1, 6.1.106-2 |
| Debian:13 | linux | 0, 6.12.38-1 |
| Debian:14 | linux | 6.13.8-1~exp1, 6.13.9-1~exp1, 6.13~rc6-1~exp1 |
Timeline
- Jul 28, 2025 CVE Published
- Sep 1, 2026 CVE Updated
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