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CVE-2026-45981

Vulnerability Description

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

s390/cio: Fix device lifecycle handling in css_alloc_subchannel()

`css_alloc_subchannel()` calls `device_initialize()` before setting up
the DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails,
the error path frees the subchannel structure directly, bypassing
the device model reference counting.

Once `device_initialize()` has been called, the embedded struct device
must be released via `put_device()`, allowing the release callback to
free the container structure.

Fix the error path by dropping the initial device reference with
`put_device()` instead of calling `kfree()` directly.

This ensures correct device lifetime handling and avoids potential
use-after-free or double-free issues.

Vulnerability Details

Published Date
Last Modified
Source
NVD
Vendor
Linux
Product
Linux

External References

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