IT

Tracker / CVE-2025-39685

CVE-2025-39685

High 7.1

In the Linux kernel, the following vulnerability has been resolved: comedi: pcl726: Prevent invalid irq number The reproducer passed in an irq number(0x80008000) that was too large, which triggered the oob. Added an interrupt number check to prevent users from passing in an irq number that was too large. If `it->options[1]` is 31, then `1 << it->options[1]` is still invalid because it shifts a 1-bit into the sign bit (which is UB in C). Possible solutions include reducing the upper bound on the `it->options[1]` value to 30 or lower, or using `1U << it->options[1]`. The old code would just not attempt to request the IRQ if the `options[1]` value were invalid. And it would still configure the device without interrupts even if the call to `request_irq` returned an error. So it would be better to combine this test with the test below.

Affected products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 3.13 → 5.15.190
linux linux_kernel · 5.16 → 6.1.149
linux linux_kernel · 6.13 → 6.16.4
linux linux_kernel · 6.2 → 6.6.103
linux linux_kernel · 6.7 → 6.12.44

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References