CVE-2025-40125

mediumpriority · track · 0EPSS 0.002 · 12 %ileDEEURU

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.22% (12th) EPSS

CVSS 4.6 · medium

Is it mine?

69 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-23

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.

cvss

Technical severity, 0–10. One row per scoring source.

4.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.6mediumAV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-252US

affected products (69)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell Avamarall versionscert_bundDEcpe:/a:dell:avamar:-
Dell ECS 3.8.1.0-3.8.1.7all versionscert_bundDEcpe:/h:dell:ecs:3.8.1.0_-_3.8.1.7
Dell NetWorkerall versionscert_bundDEcpe:/a:dell:networker:-
Google Container-Optimized OSall versionscert_bundDEcpe:/o:google:container-optimized_os:-
IBM DataPower Gatewayall versionscert_bundDEcpe:/a:ibm:datapower_gateway:-
IBM FlashSystem 5000all versionscert_bundDEcpe:/a:ibm:flashsystem:5000
IBM FlashSystem 5100all versionscert_bundDEcpe:/a:ibm:flashsystem:5100
IBM FlashSystem 5300all versionscert_bundDEcpe:/a:ibm:flashsystem:5300
IBM FlashSystem 7200all versionscert_bundDEcpe:/a:ibm:flashsystem:7200
IBM FlashSystem 7300all versionscert_bundDEcpe:/a:ibm:flashsystem:7300
IBM FlashSystem 9100all versionscert_bundDEcpe:/a:ibm:flashsystem:9100
IBM FlashSystem 9200all versionscert_bundDEcpe:/a:ibm:flashsystem:9200
IBM FlashSystem 9500all versionscert_bundDEcpe:/a:ibm:flashsystem:9500
IBM SAN Volume Controllerall versionscert_bundDEcpe:/a:ibm:san_volume_controller:-
IBM Security Verify Accessall versionscert_bundDEcpe:/a:ibm:security_verify_access:-
Open Source Linux Kernelall versionscert_bundDEcpe:/o:linux:linux_kernel:unspecified
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-

showing 20 of 69

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2579Linux Kernel: Mehrere SchwachstellenDeutsch2025-11-11csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, die möglicherweise zu einer Denial-of-Service- Bedingung führen oder eine Speicherbeschädigung verursachen können.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2025-11-12modified 2026-10-19

references (26)

External citations — patches, advisories, analysis.

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