CVE-2025-22026

nfsd: don't ignore the return code of svc_proc_register()

Published Apr 16, 2025 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

In the Linux kernel, the following vulnerability has been resolved:

nfsd: don't ignore the return code of svc_proc_register()

Currently, nfsd_proc_stat_init() ignores the return value of
svc_proc_register(). If the procfile creation fails, then the kernel
will WARN when it tries to remove the entry later.

Fix nfsd_proc_stat_init() to return the same type of pointer as
svc_proc_register(), and fix up nfsd_net_init() to check that and fail
the nfsd_net construction if it occurs.

svc_proc_register() can fail if the dentry can't be allocated, or if an
identical dentry already exists. The second case is pretty unlikely in
the nfsd_net construction codepath, so if this happens, return -ENOMEM.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`5545496966631cd40ad3aa6450be56d0e5773d10`	affected	< 51107e768de6821b68aa34a136d07bc7a09cf6c3
`73c43bccf25cec9cdec62fc22a513c28a4b28390`	affected	< e4316bd85e42b01125b2aab691769234a388b8a3
`10ece754df9a799131a1cf3197e9d26c04ddec22`	affected	< 51da899c209a9624e48be416bd30e7ed5cd6c3d8
`6f8d6ed3426a17f77628cebfb6a6e2c6f2b2496c`	affected	< 30405b23b4d5e2a596fb756d48119d7293194e75
`93483ac5fec62cc1de166051b219d953bb5e4ef4`	affected	< 6a59b70fe71ec66c0dd19e2c279c71846a3fb2f0
`93483ac5fec62cc1de166051b219d953bb5e4ef4`	affected	< e31957a819e60cf0bc9a49408765e6095fd3d046
`93483ac5fec62cc1de166051b219d953bb5e4ef4`	affected	< 9d9456185fd5f1891c74354ee297f19538141ead
`93483ac5fec62cc1de166051b219d953bb5e4ef4`	affected	< 930b64ca0c511521f0abdd1d57ce52b2a6e3476b
`b7b05f98f3f06fea3986b46e5c7fe2928676b02d`	affected	—
`5.10.226`	affected	< 5.10.259
`5.15.166`	affected	< 5.15.210
`6.1.106`	affected	< 6.1.164
`6.6.47`	affected	< 6.6.125
`6.8.10`	affected	< 6.9

Linux

affected

Version	Status	Constraints
`6.9`	affected	—
`0`	unaffected	< 6.9
`5.10.259`	unaffected	≤ 5.10.*
`5.15.210`	unaffected	≤ 5.15.*
`6.1.164`	unaffected	≤ 6.1.*
`6.6.125`	unaffected	≤ 6.6.*
`6.12.24`	unaffected	≤ 6.12.*
`6.13.12`	unaffected	≤ 6.13.*
`6.14.2`	unaffected	≤ 6.14.*
`6.15`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4499-1	linux-6.1 security update
Debian DLA	DLA-4664-1	linux security update
Debian DSA	DSA-6163-1	linux security update
EUVD	EUVD-2025-11263	In the Linux kernel, the following vulnerability has been resolved: nfsd: don't ignore the return code of svc_proc_register() Currently, nfsd_proc_stat_init() ignores the return value of svc_proc_register(). If the procfile creation fails, then the kernel will WARN when it tries to remove the entry later. Fix nfsd_proc_stat_init() to return the same type of pointer as svc_proc_register(), and fix up nfsd_net_init() to check that and fail the nfsd_net construction if it occurs. svc_proc_register() can fail if the dentry can't be allocated, or if an identical dentry already exists. The second case is pretty unlikely in the nfsd_net construction codepath, so if this happens, return -ENOMEM.
Ubuntu USN	USN-7594-1	Linux kernel vulnerabilities
Ubuntu USN	USN-7594-2	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-7594-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8028-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8028-2	Linux kernel (Real-time) vulnerabilities
Ubuntu USN	USN-8031-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8028-3	Linux kernel (Real-time) vulnerabilities
Ubuntu USN	USN-8028-4	Linux kernel (FIPS) vulnerabilities
Ubuntu USN	USN-8028-5	Linux kernel vulnerabilities
Ubuntu USN	USN-8031-2	Linux kernel (GCP FIPS) vulnerabilities
Ubuntu USN	USN-8028-6	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-8031-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8052-1	Linux kernel (Low Latency) vulnerabilities
Ubuntu USN	USN-8028-7	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-8028-8	Linux kernel (IBM) vulnerabilities
Ubuntu USN	USN-8052-2	Linux kernel (Xilinx) vulnerabilities
Ubuntu USN	USN-8074-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8074-2	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8126-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8876-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8875-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8877-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8878-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8879-1	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-8875-2	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.210% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/30405b23b4d5e2a596fb756d48119d7293194e75
https://git.kernel.org/stable/c/51107e768de6821b68aa34a136d07bc7a09cf6c3
https://git.kernel.org/stable/c/51da899c209a9624e48be416bd30e7ed5cd6c3d8
https://git.kernel.org/stable/c/6a59b70fe71ec66c0dd19e2c279c71846a3fb2f0
https://git.kernel.org/stable/c/930b64ca0c511521f0abdd1d57ce52b2a6e3476b
https://git.kernel.org/stable/c/9d9456185fd5f1891c74354ee297f19538141ead
https://git.kernel.org/stable/c/e31957a819e60cf0bc9a49408765e6095fd3d046
https://git.kernel.org/stable/c/e4316bd85e42b01125b2aab691769234a388b8a3
https://lore.kernel.org/linux-cve-announce/2025041654-CVE-2025-22026-f6be@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-22026
https://www.cve.org/CVERecord?id=CVE-2025-22026

History

Jun 19, 2026 12:45 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/51107e768de6821b68aa34a136d07bc7a09cf6c3 https://git.kernel.org/stable/c/e4316bd85e42b01125b2aab691769234a388b8a3

Jun 11, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Feb 19, 2026 4:15 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/51da899c209a9624e48be416bd30e7ed5cd6c3d8

Feb 16, 2026 9:30 AM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/30405b23b4d5e2a596fb756d48119d7293194e75

Oct 28, 2025 7:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
Metrics	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'}`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

May 27, 2025 3:00 AM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-252
Metrics	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'}`

Apr 20, 2025 8:45 AM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/6a59b70fe71ec66c0dd19e2c279c71846a3fb2f0 https://git.kernel.org/stable/c/e31957a819e60cf0bc9a49408765e6095fd3d046

Apr 19, 2025 2:00 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025041654-CVE-2025-22026-f6be@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2025-22026 https://www.cve.org/CVERecord?id=CVE-2025-22026
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Apr 16, 2025 2:30 PM Description updated. Title updated. Added references View changes

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: nfsd: don't ignore the return code of svc_proc_register() Currently, nfsd_proc_stat_init() ignores the return value of svc_proc_register(). If the procfile creation fails, then the kernel will WARN when it tries to remove the entry later. Fix nfsd_proc_stat_init() to return the same type of pointer as svc_proc_register(), and fix up nfsd_net_init() to check that and fail the nfsd_net construction if it occurs. svc_proc_register() can fail if the dentry can't be allocated, or if an identical dentry already exists. The second case is pretty unlikely in the nfsd_net construction codepath, so if this happens, return -ENOMEM.
Title		nfsd: don't ignore the return code of svc_proc_register()
References		https://git.kernel.org/stable/c/930b64ca0c511521f0abdd1d57ce52b2a6e3476b https://git.kernel.org/stable/c/9d9456185fd5f1891c74354ee297f19538141ead