cbcvebase.
CVE-2025-38571
published 2025-08-19

CVE-2025-38571: 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…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.33%
25.0th percentile
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.

Affected

33 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.16.3-1 (forky)linux 6.16.3-1 (forky)
linuxlinux
linuxlinux>= dea034b963c8901bdcc3d3880c04f0d75c95112f < a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95
linuxlinux>= dea034b963c8901bdcc3d3880c04f0d75c95112f < c36b2fbd60e8f9c6f975522130998608880c93bec36b2fbd60e8f9c6f975522130998608880c93be
linuxlinux>= dea034b963c8901bdcc3d3880c04f0d75c95112f < 3ee397eaaca4fa04db21bb98c8f1d0c6cc5253683ee397eaaca4fa04db21bb98c8f1d0c6cc525368
linuxlinux>= dea034b963c8901bdcc3d3880c04f0d75c95112f < 3feada5baf4dc96e151ff2ca54630e1d274e54583feada5baf4dc96e151ff2ca54630e1d274e5458
linuxlinux>= dea034b963c8901bdcc3d3880c04f0d75c95112f < cc5d59081fa26506d02de2127ab822f40d88bc5acc5d59081fa26506d02de2127ab822f40d88bc5a
linuxlinux_kernel>= 0 < 6.12.43-16.12.43-1
linuxlinux_kernel>= 0 < 6.16.3-16.16.3-1
linuxlinux_kernel>= 0 < 6.8.0-100.1006.8.0-100.100
linuxlinux_kernel>= 6.13 < 6.15.106.15.10
linuxlinux_kernel>= 6.16 < 6.16.16.16.1
linuxlinux_kernel>= 6.5 < 6.6.1026.6.102
linuxlinux_kernel>= 6.7 < 6.12.426.12.42
msrcazl3_kernel_6.6.22.1-2_on_azure_linux_3.0
msrcazl3_kernel_6.6.35.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.96.2-1_on_azure_linux_3.0
msrcazl3_kernel_6.6.96.2-2_on_azure_linux_3.0
msrcazure_linux_3.0_arm
msrcazure_linux_3.0_x64
msrccbl2_kernel_5.15.160.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.162.2-1_on_cbl_mariner_2.0
msrccbl_mariner_2.0_arm
msrccbl_mariner_2.0_x64
ubuntulinux-aws

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu3.2LOW
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