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CVE-2025-22026 is an unchecked-return-value vulnerability in the Linux kernel NFS server component. nfsd_proc_stat_init() ignores the result of svc_proc_register(), allowing NFS server network-namespace construction to continue after procfile creation fails. Subsequent cleanup attempts to remove the uncreated entry, triggering a kernel WARN. Registration can fail because a dentry cannot be allocated or an identical dentry already exists; the latter condition is considered unlikely during nfsd_net construction.
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No public exploit code observed for this vulnerability.
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25 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel nfsd error-handling vulnerability caused by ignoring failure of svc_proc_register() during initialization. Failed procfile creation can trigger a kernel warning during subsequent cleanup. The fix propagates the failure and aborts nfsd network initialization. The reference assigns medium severity and a CVSS v3 score of 5.5, indicating local, low-privilege access and high availability impact.
A Linux kernel NFS server (nfsd) flaw involving failure to handle the return code from svc_proc_register().
A Linux kernel NFS server daemon (nfsd) error-handling flaw in proc-file registration. If svc_proc_register() fails, the prior code ignored the failure and could later trigger a kernel warning when removing the uncreated proc entry, potentially affecting availability.
An Important-severity locally exploitable availability-impacting vulnerability addressed by the CentOS 7 TuxCare advisory. The listed CVSS v3 vector is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.