CVE-2025-38478

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Source
https://cve.org/CVERecord?id=CVE-2025-38478
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38478.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38478
Downstream
Related
Published
2025-07-28T11:21:44.210Z
Modified
2026-05-28T03:55:02.218823725Z
Summary
comedi: Fix initialization of data for instructions that write to subdevice
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38478.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
ed9eccbe8970f6eedc1b978c157caf1251a896d4
Fixed
6f38c6380c3b38a05032b8881e41137385a6ce02
Fixed
13e4d9038a1e869445a996a3f604a84ef52fe8f4
Fixed
020eed5681d0f9bced73970368078a92d6cfaa9c
Fixed
d3436638738ace8f101af7bdee2eae1bc38e9b29
Fixed
673ee92bd2d31055bca98a1d96b653f5284289c4
Fixed
c42116dc70af6664526f7aa82cf937824ab42649
Fixed
fe8713fb4e4e82a4f91910d9a41bf0613e69a0b9
Fixed
46d8c744136ce2454aa4c35c138cc06817f92b8e

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38478.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.29
Fixed
5.4.297
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.241
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.190
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.147
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.100
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.40
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.15.8

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38478.json"