CVE-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 subdevice i…
Published Jul 28, 2025 · updated Oct 15, 2026 · linux linux kernel
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 elements in some cases. The and functions allocate at least (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 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 elements are initialized before calling these instruction handlers, filling the uncopied elements with 0. For , the same data buffer elements are used for handling a list of instructions, so ensure the first elements are initialized for each instruction that writes to the subdevice.
Code
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Timeline
Detection, updates, and resolution for this record.
Jul 28, 2025 · NIST NVD
Detected
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 elements in some cases. The and functions allocate at least (16) data elements to deal with this, but they do not initialize all of that. For Comedi i
Oct 15, 2026 · NIST NVD
Updated
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 elements in some cases. The and functions allocate at least (16) data elements to deal with this, but they do not initialize all of that. For Comedi i
Affected
- cpe debian/debian linux11.0
- cpe linux/linux kernelversion unspecified
- cpe linux/linux kernel6.16
Sources
- CVE.orgVulnerability recordCVE-2025-38478
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-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 subdevice instruction handlers are known to access instruction data elements beyond the first elements in some c
nvd.nist.gov