Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.5, < 6.6.102 |
References
- https://git.kernel.org/stable/c/3ee397eaaca4fa04db21bb98c8f1d0c6cc525368Patch
- https://git.kernel.org/stable/c/3feada5baf4dc96e151ff2ca54630e1d274e5458Patch
- https://git.kernel.org/stable/c/a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95Patch
- https://git.kernel.org/stable/c/c36b2fbd60e8f9c6f975522130998608880c93bePatch
- https://git.kernel.org/stable/c/cc5d59081fa26506d02de2127ab822f40d88bc5aPatch
FAQ
What is CVE-2025-38571?
CVE-2025-38571 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 assu...
How severe is CVE-2025-38571?
CVE-2025-38571 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38571?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.