In the Linux kernel, the following vulnerability has been resolved:
comedi: fix divide-by-zero in comedi_buf_munge()
The comedi_buf_munge() function performs a modulo operation
`async->munge_chan %= async->cmd.chanlist_len` without first
checking if chanlist_len is zero. If a user program submits a command with
chanlist_len 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 chanlist_len at the beginning of the
function, similar to the existing checks for !map and
CMDF_RAWDATA flag. When chanlist_len is zero, update
munge_count and return early, indicating the data was
handled without munging.
This prevents potential kernel panics from malformed user commands.
CVSS
No CVSS.
References
Configurations
No configuration.
History
31 Oct 2025, 10:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-31 10:15
Updated : 2025-10-31 10:15
NVD link : CVE-2025-40106
Mitre link : CVE-2025-40106
CVE.ORG link : CVE-2025-40106
JSON object : View
Products Affected
No product.
CWE
No CWE.