CVE-2025-38571
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-19

Last updated on: 2025-11-26

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix client side handling of tls alerts A security exploit was discovered in NFS over TLS in tls_alert_recv due to its assumption that there is valid data in the msghdr's iterator's kvec. Instead, this patch proposes the rework how control messages are setup and used by sock_recvmsg(). If no control message structure is setup, kTLS layer will read and process TLS data record types. As soon as it encounters a TLS control message, it would return an error. At that point, NFS can setup a kvec backed control buffer and read in the control message such as a TLS alert. Scott found that a msg iterator can advance the kvec pointer as a part of the copy process thus we need to revert the iterator before calling into the tls_alert_recv.
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Meta Information
Published
2025-08-19
Last Modified
2025-11-26
Generated
2026-05-27
AI Q&A
2025-08-19
EPSS Evaluated
2026-05-25
NVD
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
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CWE ID Description
CWE-NVD-CWE-noinfo
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is in the Linux kernel's handling of TLS alerts on the client side for NFS over TLS. The issue arises because the code incorrectly assumes that there is valid data in the message header's iterator's kvec. This leads to improper processing of TLS control messages, such as TLS alerts, which can cause errors or unexpected behavior. The fix involves reworking how control messages are set up and used by sock_recvmsg(), ensuring that the message iterator is correctly managed before processing TLS alerts.


How can this vulnerability impact me? :

This vulnerability could lead to errors or failures in the processing of TLS alerts in NFS over TLS connections, potentially causing disruptions or denial of service in network file system communications secured by TLS. It may allow an attacker to exploit the improper handling of TLS alerts to interfere with secure communications.


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