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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*

No data.

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

Wed, 01 Oct 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00021}

 epss

{'score': 0.00029}

Fri, 14 Mar 2025 02:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 13 Mar 2025 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-416
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Wed, 12 Mar 2025 09:45:00 +0000

Type Values Removed Values Added
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.
Title s390/ism: add release function for struct device
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-03-12T09:42:09.929Z

Updated: 2025-10-01T19:26:38.355Z

Reserved: 2024-12-29T08:45:45.780Z

Link: CVE-2025-21856

cve-icon Vulnrichment

Updated: 2025-10-01T16:58:25.756Z

cve-icon NVD

Status : Modified

Published: 2025-03-12T10:15:18.453

Modified: 2025-10-01T20:18:29.757

Link: CVE-2025-21856

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-03-12T00:00:00Z

Links: CVE-2025-21856 - Bugzilla