linux-cve-announce - CVE-2025-71226: wifi: iwlwifi: Implement settime64 as stub for MVM/MLD PTP

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Message-ID: <2026021859-CVE-2025-71226-5662@gregkh>
Date: Wed, 18 Feb 2026 15:22:01 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71226: wifi: iwlwifi: Implement settime64 as stub for MVM/MLD PTP

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

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

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

wifi: iwlwifi: Implement settime64 as stub for MVM/MLD PTP

Since commit dfb073d32cac ("ptp: Return -EINVAL on ptp_clock_register if
required ops are NULL"), PTP clock registered through ptp_clock_register
is required to have ptp_clock_info.settime64 set, however, neither MVM
nor MLD's PTP clock implementation sets it, resulting in warnings when
the interface starts up, like

WARNING: drivers/ptp/ptp_clock.c:325 at ptp_clock_register+0x2c8/0x6b8, CPU#1: wpa_supplicant/469
CPU: 1 UID: 0 PID: 469 Comm: wpa_supplicant Not tainted 6.18.0+ #101 PREEMPT(full)
ra: ffff800002732cd4 iwl_mvm_ptp_init+0x114/0x188 [iwlmvm]
ERA: 9000000002fdc468 ptp_clock_register+0x2c8/0x6b8
iwlwifi 0000:01:00.0: Failed to register PHC clock (-22)

I don't find an appropriate firmware interface to implement settime64()
for iwlwifi MLD/MVM, thus instead create a stub that returns
-EOPTNOTSUPP only, suppressing the warning and allowing the PTP clock to
be registered.

The Linux kernel CVE team has assigned CVE-2025-71226 to this issue.


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

	Fixed in 6.18.10 with commit ff6892ea544c4052dd5799f675ebc20419953801
	Fixed in 6.19 with commit 81d90d93d22ca4f61833cba921dce9a0bd82218f

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-2025-71226
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/wireless/intel/iwlwifi/mld/ptp.c
	drivers/net/wireless/intel/iwlwifi/mvm/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/ff6892ea544c4052dd5799f675ebc20419953801
	https://git.kernel.org/stable/c/81d90d93d22ca4f61833cba921dce9a0bd82218f