---
id: CVE-2025-38571
title: |-
  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 th…
summary: |-
  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 th…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.5, < 6.6.102'
  - 'linux_kernel >= 6.7, < 6.12.42'
  - 'linux_kernel >= 6.13, < 6.15.10'
  - 'linux_kernel >= 6.16, < 6.16.1'
patched:
  - linux_kernel 6.16.1
published: '2025-08-19'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:45.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-38571'
references:
  - url: 'https://git.kernel.org/stable/c/3ee397eaaca4fa04db21bb98c8f1d0c6cc525368'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3feada5baf4dc96e151ff2ca54630e1d274e5458'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c36b2fbd60e8f9c6f975522130998608880c93be'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cc5d59081fa26506d02de2127ab822f40d88bc5a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00346
epssPercentile: 0.2799
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-15T21:51:48.078418Z'
ingestedAt: '2026-10-15T22:48:25.514Z'
---

## Overview

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

- `linux_kernel >= 6.5, < 6.6.102`
- `linux_kernel >= 6.7, < 6.12.42`
- `linux_kernel >= 6.13, < 6.15.10`
- `linux_kernel >= 6.16, < 6.16.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.16.1`