Kernel warning via ignored proc registration failure
Published Apr 16, 2025 · Updated Jun 19, 2026
Improper error handling in Linux nfsd allows local users to trigger a kernel warning through failed proc-entry creation. nfsd_proc_stat_init() discards svc_proc_register()'s failure result, so later cleanup attempts to remove a proc entry that was never created. The path requires dentry allocation failure or an unexpected duplicate dentry during nfsd network-namespace construction; published sources establish neither reliable attacker control over either condition nor a resulting service interruption.
Summary
What happened
Improper error handling in Linux nfsd allows local users to trigger a kernel warning through failed proc-entry creation. nfsd_proc_stat_init() discards svc_proc_register()'s failure result, so later cleanup attempts to remove a proc entry that was never created. The path requires dentry allocation failure or an unexpected duplicate dentry during nfsd network-namespace construction; published sources establish neither reliable attacker control over either condition nor a resulting service interruption.
The record
- CVE
- CVE-2025-22026
- Published
- Apr 16, 2025
- Updated
- Jun 19, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-252
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 16, 2025CVE publishedPublication date reported by the CVE source.
- Jun 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10ece754df9a799131a1cf3197e9d26c04ddec22 <51da899c209a9624e48be416bd30e7ed5cd6c3d8
- Affected versionversion=5.10.226 <5.10.259
- Affected versionversion=5.15.166 <5.15.210
- Affected versionversion=5545496966631cd40ad3aa6450be56d0e5773d10 <51107e768de6821b68aa34a136d07bc7a09cf6c3
- Affected versionversion=6.1.106 <6.1.164
- Affected versionversion=6.6.47 <6.6.125
- Affected versionversion=6.8.10 <6.9
- Affected versionversion=6.9
- Affected versionversion=6f8d6ed3426a17f77628cebfb6a6e2c6f2b2496c <30405b23b4d5e2a596fb756d48119d7293194e75
- Affected versionversion=73c43bccf25cec9cdec62fc22a513c28a4b28390 <e4316bd85e42b01125b2aab691769234a388b8a3
- Affected versionversion=93483ac5fec62cc1de166051b219d953bb5e4ef4 <6a59b70fe71ec66c0dd19e2c279c71846a3fb2f0
- Affected versionversion=93483ac5fec62cc1de166051b219d953bb5e4ef4 <930b64ca0c511521f0abdd1d57ce52b2a6e3476b
- Affected versionversion=93483ac5fec62cc1de166051b219d953bb5e4ef4 <9d9456185fd5f1891c74354ee297f19538141ead
- Affected versionversion=93483ac5fec62cc1de166051b219d953bb5e4ef4 <e31957a819e60cf0bc9a49408765e6095fd3d046
- Affected versionversion=b7b05f98f3f06fea3986b46e5c7fe2928676b02d
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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