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DEBIAN-CVE-2025-38478
No affected components available
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.
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- CVE-2025-38478Upstream
- EUVD-2025-22884Upstream
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