Loading vulnerability…
CVE-2026-53398 is a flaw in the Linux kernel NFS server implementation affecting the SECINFO_NO_NAME decode path. In nfsd4_decode_secinfo_no_name(), the sin_exp field was initialized only after decoding sin_style. If the incoming XDR stream was truncated before that point, the decoder returned a bad XDR error before sin_exp had been initialized. Because the relevant inline operation array was no longer cleared between RPC calls, sin_exp could retain stale union contents from a previous operation. The error cleanup path still invoked nfsd4_secinfo_no_name_release(), which could call exp_put() on a non-NULL stale sin_exp value. This creates a refcount corruption condition that can lead to a use-after-free in the NFSD server error-handling path. The upstream fix initializes sin_exp before the first failable decode step, aligning behavior with nfsd4_decode_secinfo().
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
1 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.
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.