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CVE-2025-22026 is a Linux kernel flaw in the NFS server subsystem (nfsd) caused by improper handling of the return value from svc_proc_register() during procfs statistics initialization. In the vulnerable code path, nfsd_proc_stat_init() ignored failures from svc_proc_register(), allowing nfsd network namespace initialization to proceed even when procfile registration had failed. Later cleanup could then attempt to remove an entry that was never successfully created, triggering a kernel WARN. The fix changes nfsd_proc_stat_init() to propagate the pointer/error result from svc_proc_register() and updates nfsd_net_init() to abort nfsd network namespace construction when registration fails. Failure conditions include dentry allocation failure and, less likely, attempted creation of an already existing identical dentry.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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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.