CVE-2025-21856

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Source
https://cve.org/CVERecord?id=CVE-2025-21856
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21856.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21856
Downstream
Related
Published
2025-03-12T09:42:09.929Z
Modified
2026-03-20T12:41:12.539761Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
s390/ism: add release function for struct device
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21856.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8c81ba20349daf9f7e58bb05a0c12f4b71813a30
Fixed
940d15254d2216b585558bcf36312da50074e711
Fixed
0505ff2936f166405d81d0d454a81d9c14124344
Fixed
e26e8ac27351f457091459a0a355bacd06d5bb2b
Fixed
915e34d5ad35a6a9e56113f852ade4a730fb88f0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21856.json"