CVE-2025-21856

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8c81ba20349daf9f7e58bb05a0c12f4b71813a30 < 940d15254d2216b585558bcf36312da50074e711affected
LinuxLinux8c81ba20349daf9f7e58bb05a0c12f4b71813a30 < 0505ff2936f166405d81d0d454a81d9c14124344affected
LinuxLinux8c81ba20349daf9f7e58bb05a0c12f4b71813a30 < e26e8ac27351f457091459a0a355bacd06d5bb2baffected
LinuxLinux8c81ba20349daf9f7e58bb05a0c12f4b71813a30 < 915e34d5ad35a6a9e56113f852ade4a730fb88f0affected
LinuxLinux6.3affected
LinuxLinux0 < 6.3unaffected
LinuxLinux6.6.80 <= 6.6.*unaffected
LinuxLinux6.12.17 <= 6.12.*unaffected
LinuxLinux6.13.5 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References