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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-40125 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: blk-mq: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx In __blk_mq_update_nr_hw_queues() the return value of blk_mq_sysfs_register_hctxs() is not checked. If sysfs creation for hctx fails, later changing the number of hw_queues or removing disk will trigger the following warning: kernfs: can not remove 'nr_tags', no directory WARNING: CPU: 2 PID: 637 at fs/kernfs/dir.c:1707 kernfs_remove_by_name_ns+0x13f/0x160 Call Trace: remove_files.isra.1+0x38/0xb0 sysfs_remove_group+0x4d/0x100 sysfs_remove_groups+0x31/0x60 __kobject_del+0x23/0xf0 kobject_del+0x17/0x40 blk_mq_unregister_hctx+0x5d/0x80 blk_mq_sysfs_unregister_hctxs+0x94/0xd0 blk_mq_update_nr_hw_queues+0x124/0x760 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] nullb_device_submit_queues_store+0x92/0x120 [null_blk] kobjct_del() was called unconditionally even if sysfs creation failed. Fix it by checkig the kobject creation statusbefore deleting it.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/06c4826b1d900611096e4621e93133db57e13911 kernel.org
https://git.kernel.org/stable/c/4b97e99b87a773d52699521d40864f3ec888e9a6 kernel.org
https://git.kernel.org/stable/c/4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed kernel.org
https://git.kernel.org/stable/c/6e7dadc5763c48eb3b9b91265a21f312599ebb2c kernel.org
https://git.kernel.org/stable/c/a8c53553f1833cc2d14175d2d72cf37193a01898 kernel.org
https://git.kernel.org/stable/c/babc634e9fe2803962dba98a07587e835dbc0731 kernel.org
https://git.kernel.org/stable/c/cc14ea21c4e658814d737ed4dedde6cd626a15ad kernel.org
https://git.kernel.org/stable/c/d5ddd76ee52bdc16e9f8b1e7791291e785dab032 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-40125
NVD Published Date:
11/12/2025
NVD Last Modified:
11/12/2025
Source:
kernel.org