CVE-2025-37995: module: ensure that kobject_put() is safe for module type kobjects

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-29 · updated 2026-06-17
Weakness: CWE-824

Description

In the Linux kernel, the following vulnerability has been resolved: module: ensure that kobject_put() is safe for module type kobjects In 'lookup_or_create_module_kobject()', an internal kobject is created using 'module_ktype'. So call to 'kobject_put()' on error handling path causes an attempt to use an uninitialized completion pointer in 'module_kobject_release()'. In this scenario, we just want to release kobject without an extra synchronization required for a regular module unloading process, so adding an extra check whether 'complete()' is actually required makes 'kobject_put()' safe.

Affected products

Debian Linux: 11.0
Linux kernel: from 3.12 before 5.4.294; from 5.5 before 5.10.238; from 5.11 before 5.15.183; from 5.16 before 6.1.139; from 6.2 before 6.6.91; from 6.7 before 6.12.29 — fixed in 5.10.238, 5.15.183, 5.4.294, 6.1.139, 6.12.29, 6.14.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.238, 5.15.183, 5.4.294, 6.1.139. Check the vendor advisory for mitigations.

References

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