CVE-2025-21856
High
Description
In the Linux kernel, the following vulnerability has been resolved: s390/ism: add release function for struct device According to device_release() in /drivers/base/core.c, a device without a release function is a broken device and must be fixed. The current code directly frees the device after calling device_add() without waiting for other kernel parts to release their references. Thus, a reference could still be held to a struct device, e.g., by sysfs, leading to potential use-after-free issues if a proper release function is not set.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedMar 12, 2025
First seenMar 12, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel6.6.80, 6.12.17, 6.13.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.3 ≤ v < 6.6.80, 6.7 ≤ v < 6.12.17, 6.13 ≤ v < 6.13.5, 6.14 | 6.6.80, 6.12.17, 6.13.5 |
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