linux-cve-announce - CVE-2025-68752: iavf: Implement settime64 with -EOPNOTSUPP

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Message-ID: <2026010548-CVE-2025-68752-b0e7@gregkh>
Date: Mon,  5 Jan 2026 10:32:48 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68752: iavf: Implement settime64 with -EOPNOTSUPP

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

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

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

iavf: Implement settime64 with -EOPNOTSUPP

ptp_clock_settime() assumes every ptp_clock has implemented settime64().
Stub it with -EOPNOTSUPP to prevent a NULL dereference.

The fix is similar to commit 329d050bbe63 ("gve: Implement settime64
with -EOPNOTSUPP").

The Linux kernel CVE team has assigned CVE-2025-68752 to this issue.


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

	Issue introduced in 6.15 with commit d734223b2f0dc4f5826204ee628ad6273148223d and fixed in 6.17.13 with commit 9e3dbc3bb2e2aa728b49422b2e5344488f93f690
	Issue introduced in 6.15 with commit d734223b2f0dc4f5826204ee628ad6273148223d and fixed in 6.18.2 with commit 6d080f810ffd6b8e002ce5bee8b9c551ca2535c2
	Issue introduced in 6.15 with commit d734223b2f0dc4f5826204ee628ad6273148223d and fixed in 6.19-rc1 with commit 1e43ebcd5152b3e681a334cc6542fb21770c3a2e

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-2025-68752
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:
	drivers/net/ethernet/intel/iavf/iavf_ptp.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/9e3dbc3bb2e2aa728b49422b2e5344488f93f690
	https://git.kernel.org/stable/c/6d080f810ffd6b8e002ce5bee8b9c551ca2535c2
	https://git.kernel.org/stable/c/1e43ebcd5152b3e681a334cc6542fb21770c3a2e