CVE-2025-38481

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Source
https://cve.org/CVERecord?id=CVE-2025-38481
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38481.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38481
Downstream
Related
Published
2025-07-28T11:21:46.147Z
Modified
2026-03-12T02:16:51.033064Z
Summary
comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
Details

In the Linux kernel, the following vulnerability has been resolved:

comedi: Fail COMEDIINSNLIST ioctl if ninsns 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38481.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
454d732dfd0aef7d7aa950c409215ca06d717e93
Fixed
c68257588e87f45530235701a42496b7e9e56adb
Fixed
69dc06b9514522de532e997a21d035cd29b0db44
Fixed
d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3
Fixed
c9d3d9667443caafa804cd07940aeaef8e53aa90
Fixed
992d600f284e719242a434166e86c1999649b71c
Fixed
e3b8322cc8081d142ee4c1a43e1d702bdba1ed76
Fixed
08ae4b20f5e82101d77326ecab9089e110f224cc

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38481.json"