linux-cve-announce - CVE-2025-68234: io_uring/cmd_net: fix wrong argument types for skb_queue

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Message-ID: <2025121617-CVE-2025-68234-5ab4@gregkh>
Date: Tue, 16 Dec 2025 15:04:20 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68234: io_uring/cmd_net: fix wrong argument types for skb_queue_splice()

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

io_uring/cmd_net: fix wrong argument types for skb_queue_splice()

If timestamp retriving needs to be retried and the local list of
SKB's already has entries, then it's spliced back into the socket
queue. However, the arguments for the splice helper are transposed,
causing exactly the wrong direction of splicing into the on-stack
list. Fix that up.

The Linux kernel CVE team has assigned CVE-2025-68234 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.17 with commit 9e4ed359b8efad0e8ad4510d8ad22bf0b060526a and fixed in 6.17.10 with commit c85d2cfc5e24e6866b56c7253fd4e1c7db35986c
	Issue introduced in 6.17 with commit 9e4ed359b8efad0e8ad4510d8ad22bf0b060526a and fixed in 6.18 with commit 46447367a52965e9d35f112f5b26fc8ff8ec443d

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-68234
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	io_uring/cmd_net.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/c85d2cfc5e24e6866b56c7253fd4e1c7db35986c
	https://git.kernel.org/stable/c/46447367a52965e9d35f112f5b26fc8ff8ec443d