CVE-2025-21856

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.

The following products are affected by CVE-2025-21856 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-21856.

URL	Resource
https://git.kernel.org/stable/c/0505ff2936f166405d81d0d454a81d9c14124344
https://git.kernel.org/stable/c/915e34d5ad35a6a9e56113f852ade4a730fb88f0
https://git.kernel.org/stable/c/940d15254d2216b585558bcf36312da50074e711
https://git.kernel.org/stable/c/e26e8ac27351f457091459a0a355bacd06d5bb2b
https://lore.kernel.org/linux-cve-announce/2025031215-CVE-2025-21856-8865@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-21856
https://www.cve.org/CVERecord?id=CVE-2025-21856