CVE-2025-40125
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
blk-mq: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | a8c53553f1833cc2d14175d2d72cf37193a01898 | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | cc14ea21c4e658814d737ed4dedde6cd626a15ad | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | 4b97e99b87a773d52699521d40864f3ec888e9a6 | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | 6e7dadc5763c48eb3b9b91265a21f312599ebb2c | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | 06c4826b1d900611096e4621e93133db57e13911 | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | babc634e9fe2803962dba98a07587e835dbc0731 | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | d5ddd76ee52bdc16e9f8b1e7791291e785dab032 | Unavailable | None listed |
| 477e19dedc9d3e1f4443a1d4ae00572a988120ea | affected | git | 4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.20 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.20 | Unavailable | None listed |
| 5.4.301 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.246 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.195 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.156 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.112 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.53 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.3 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |