CVE-2025-40106

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Source
https://cve.org/CVERecord?id=CVE-2025-40106
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40106.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-40106
Downstream
Related
Published
2025-10-31T09:41:46.740Z
Modified
2026-03-20T12:43:11.024892Z
Summary
comedi: fix divide-by-zero in comedi_buf_munge()
Details

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

comedi: fix divide-by-zero in comedibufmunge()

The comedibufmunge() function performs a modulo operation async->munge_chan %= async->cmd.chanlist_len without first checking if chanlistlen is zero. If a user program submits a command with chanlistlen set to zero, this causes a divide-by-zero error when the device processes data in the interrupt handler path.

Add a check for zero chanlistlen at the beginning of the function, similar to the existing checks for !map and CMDFRAWDATA flag. When chanlistlen is zero, update mungecount and return early, indicating the data was handled without munging.

This prevents potential kernel panics from malformed user commands.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40106.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
4ffea48c69cb2b96a281cb7e5e42d706996631db
Fixed
8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c
Fixed
2670932f2465793fea1ef073e40883e8390fa4d9
Fixed
6db19822512396be1a3e1e20c16c97270285ba1a
Fixed
d4854eff25efb06d0d84c13e7129bbdba4125f8c
Fixed
a4bb5d1bc2f238461bcbe5303eb500466690bb2c
Fixed
55520f65fd447e04099a2c44185453c18ea73b7e
Fixed
87b318ba81dda2ee7b603f4f6c55e78ec3e95974

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40106.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.29
Fixed
5.4.301
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.246
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.196
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.158
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.115
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.56
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.17.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40106.json"