linux-cve-announce - CVE-2025-39732: wifi: ath11k: fix sleeping-in-atomic in ath11k_mac_op_set_bitrate

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Message-ID: <2025090730-CVE-2025-39732-4c7f@gregkh>
Date: Sun,  7 Sep 2025 17:16:33 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-39732: wifi: ath11k: fix sleeping-in-atomic in ath11k_mac_op_set_bitrate_mask()

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

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

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

wifi: ath11k: fix sleeping-in-atomic in ath11k_mac_op_set_bitrate_mask()

ath11k_mac_disable_peer_fixed_rate() is passed as the iterator to
ieee80211_iterate_stations_atomic(). Note in this case the iterator is
required to be atomic, however ath11k_mac_disable_peer_fixed_rate() does
not follow it as it might sleep. Consequently below warning is seen:

BUG: sleeping function called from invalid context at wmi.c:304
Call Trace:
 <TASK>
 dump_stack_lvl
 __might_resched.cold
 ath11k_wmi_cmd_send
 ath11k_wmi_set_peer_param
 ath11k_mac_disable_peer_fixed_rate
 ieee80211_iterate_stations_atomic
 ath11k_mac_op_set_bitrate_mask.cold

Change to ieee80211_iterate_stations_mtx() to fix this issue.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30

The Linux kernel CVE team has assigned CVE-2025-39732 to this issue.


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

	Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 6.12.42 with commit 9c0e3144924c7db701575a73af341d33184afeaf
	Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 6.15.10 with commit 7d4d0db0dc9424de2bdc0b45e919e4892603356f
	Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 6.16.1 with commit 6bdef22d540258ca06f079f7b6ae100669a19b47
	Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 6.17-rc1 with commit 65c12b104cb942d588a1a093acc4537fb3d3b129

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-2025-39732
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/ath/ath11k/mac.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/9c0e3144924c7db701575a73af341d33184afeaf
	https://git.kernel.org/stable/c/7d4d0db0dc9424de2bdc0b45e919e4892603356f
	https://git.kernel.org/stable/c/6bdef22d540258ca06f079f7b6ae100669a19b47
	https://git.kernel.org/stable/c/65c12b104cb942d588a1a093acc4537fb3d3b129