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CVE-2025-38566 is a Linux kernel SunRPC vulnerability affecting server-side TLS-alert processing for NFS over TLS. The tls_alert_recv() path incorrectly assumed that TLS alert data remained available through the message iterator's kvec. kTLS separates non-data TLS records between a control-message buffer, containing record metadata, and a message payload buffer, containing alert payload data. Message copying can advance the iterator and its kvec pointer before tls_alert_recv() processes the alert. The corrected implementation reworks control-message handling with sock_recvmsg() and restores the message iterator before calling tls_alert_recv().
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel SUNRPC vulnerability involving server-side handling of TLS alerts.
Linux kernel SunRPC flaw affecting server-side handling of TLS alerts.
A Linux kernel SunRPC server-side TLS alert-handling flaw.
A Linux kernel SunRPC issue involving handling of server-side TLS alerts. It is addressed by Red Hat's Moderate-severity kernel update for Red Hat Enterprise Linux 10.
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.