CVE-2025-38478
published 2025-07-28CVE-2025-38478: In the Linux kernel, the following vulnerability has been resolved: comedi: Fix initialization of data for instructions that write to subdevice Some Comedi…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
In the Linux kernel, the following vulnerability has been resolved:
comedi: Fix initialization of data for instructions that write to subdevice
Some Comedi subdevice instruction handlers are known to access
instruction data elements beyond the first `insn->n` elements in some
cases. The `do_insn_ioctl()` and `do_insnlist_ioctl()` functions
allocate at least `MIN_SAMPLES` (16) data elements to deal with this,
but they do not initialize all of that. For Comedi instruction codes
that write to the subdevice, the first `insn->n` data elements are
copied from user-space, but the remaining elements are left
uninitialized. That could be a problem if the subdevice instruction
handler reads the uninitialized data. Ensure that the first
`MIN_SAMPLES` elements are initialized before calling these instruction
handlers, filling the uncopied elements with 0. For
`do_insnlist_ioctl()`, the same data buffer elements are used for
handling a list of instructions, so ensure the first `MIN_SAMPLES`
elements are initialized for each instruction that writes to the
subdevice.
Affected
37 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 6f38c6380c3b38a05032b8881e41137385a6ce02 | 6f38c6380c3b38a05032b8881e41137385a6ce02 |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 13e4d9038a1e869445a996a3f604a84ef52fe8f4 | 13e4d9038a1e869445a996a3f604a84ef52fe8f4 |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 020eed5681d0f9bced73970368078a92d6cfaa9c | 020eed5681d0f9bced73970368078a92d6cfaa9c |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < d3436638738ace8f101af7bdee2eae1bc38e9b29 | d3436638738ace8f101af7bdee2eae1bc38e9b29 |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 673ee92bd2d31055bca98a1d96b653f5284289c4 | 673ee92bd2d31055bca98a1d96b653f5284289c4 |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < c42116dc70af6664526f7aa82cf937824ab42649 | c42116dc70af6664526f7aa82cf937824ab42649 |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9 | fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9 |
| linux | linux | >= ed9eccbe8970f6eedc1b978c157caf1251a896d4 < 46d8c744136ce2454aa4c35c138cc06817f92b8e | 46d8c744136ce2454aa4c35c138cc06817f92b8e |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.147-1 | 6.1.147-1 |
| linux | linux_kernel | >= 0 < 6.12.41-1 | 6.12.41-1 |
| linux | linux_kernel | >= 0 < 6.16.3-1 | 6.16.3-1 |
| linux | linux_kernel | >= 0 < 5.15.0-163.173 | 5.15.0-163.173 |
| linux | linux_kernel | >= 0 < 6.8.0-100.100 | 6.8.0-100.100 |
| linux | linux_kernel | >= 2.6.29 < 5.4.297 | 5.4.297 |
| linux | linux_kernel | >= 5.11 < 5.15.190 | 5.15.190 |
| linux | linux_kernel | >= 5.16 < 6.1.147 | 6.1.147 |
| linux | linux_kernel | >= 5.5 < 5.10.241 | 5.10.241 |
| linux | linux_kernel | >= 6.13 < 6.15.8 | 6.15.8 |
| linux | linux_kernel | >= 6.2 < 6.6.100 | 6.6.100 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM