What’s Vulnerable › Vulnerabilities

CVE-2025-22026: nfsd: don't ignore the return code of svc_proc_register()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-16 · updated 2026-06-19
• Weakness: CWE-252

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

• Linux kernel: before 6.12.24; from 6.13 before 6.13.12; from 6.14 before 6.14.2 — fixed in 6.12.24, 6.13.12, 6.14.2

How to fix

Upgrade to a fixed version: Linux kernel 6.12.24, 6.13.12, 6.14.2. Check the vendor advisory for mitigations.

References

• 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

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