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CVE-2025-38571 affects Linux kernel SUNRPC client-side TLS-alert handling used by NFS over TLS. The tls_alert_recv() function assumes that the message header iterator's kvec contains valid data. However, copying can advance the iterator's kvec pointer, invalidating that assumption before TLS-alert processing. The fix reworks control-message handling through sock_recvmsg(), configures a kvec-backed control buffer when a TLS control message is encountered, and restores the iterator before calling tls_alert_recv().
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A Linux kernel SUNRPC vulnerability affecting client-side TLS alert handling in NFS over TLS. The tls_alert_recv function assumes valid data exists in the message iterator's kvec, although copying can advance the kvec pointer. The fix reworks control-message handling and restores the iterator before processing TLS alerts. The listed CVSS v3 score is 5.5, indicating a local, low-privilege vulnerability with high availability impact and no confidentiality or integrity impact.
Linux kernel SUNRPC vulnerability involving client-side handling of TLS alerts.
Linux kernel SunRPC flaw in client-side handling of TLS alerts.
Linux kernel SunRPC flaw affecting client-side handling of TLS alerts.
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Cross-references every affected SKU, including bundled OEM variants.
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