CVE-2025-40125: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40125DEBIAN-CVE-2025-40125
Published 12-11-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-40125 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.3% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.22%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 31 · Related 29
DLA-4379-1DLA-4404-1USN-8029-1USN-8029-2USN-8029-3USN-8030-1

Timeline

  1. 12-11-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.01 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu149 products
  • linuxAll versions (No fix recorded) | < 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1100.107 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < a8c53553f1833cc2d14175d2d72cf37193a01898 | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < cc14ea21c4e658814d737ed4dedde6cd626a15ad | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < 4b97e99b87a773d52699521d40864f3ec888e9a6 | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < 6e7dadc5763c48eb3b9b91265a21f312599ebb2c | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < 06c4826b1d900611096e4621e93133db57e13911 | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < babc634e9fe2803962dba98a07587e835dbc0731 | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < d5ddd76ee52bdc16e9f8b1e7791291e785dab032 | ≥ 477e19dedc9d3e1f4443a1d4ae00572a988120ea, < 4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed | 4.20

3 vendors · 151 products

References

41 links
Show all 41 references