linux-cve-announce - CVE-2025-38290: wifi: ath12k: fix node corruption in ar->arvifs list

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Message-ID: <2025071011-CVE-2025-38290-36c3@gregkh>
Date: Thu, 10 Jul 2025 09:42:31 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38290: wifi: ath12k: fix node corruption in ar->arvifs list

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

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

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

wifi: ath12k: fix node corruption in ar->arvifs list

In current WLAN recovery code flow, ath12k_core_halt() only reinitializes
the "arvifs" list head. This will cause the list node immediately following
the list head to become an invalid list node. Because the prev of that node
still points to the list head "arvifs", but the next of the list head
"arvifs" no longer points to that list node.

When a WLAN recovery occurs during the execution of a vif removal, and it
happens before the spin_lock_bh(&ar->data_lock) in
ath12k_mac_vdev_delete(), list_del() will detect the previously mentioned
situation, thereby triggering a kernel panic.

The fix is to remove and reinitialize all vif list nodes from the list head
"arvifs" during WLAN halt. The reinitialization is to make the list nodes
valid, ensuring that the list_del() in ath12k_mac_vdev_delete() can execute
normally.

Call trace:
__list_del_entry_valid_or_report+0xd4/0x100 (P)
ath12k_mac_remove_link_interface.isra.0+0xf8/0x2e4 [ath12k]
ath12k_scan_vdev_clean_work+0x40/0x164 [ath12k]
cfg80211_wiphy_work+0xfc/0x100
process_one_work+0x164/0x2d0
worker_thread+0x254/0x380
kthread+0xfc/0x100
ret_from_fork+0x10/0x20

The change is mostly copied from the ath11k patch:
https://lore.kernel.org/all/20250320053145.3445187-1-quic_stonez@quicinc.com/

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

The Linux kernel CVE team has assigned CVE-2025-38290 to this issue.


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

	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.6.94 with commit be049199dec9189602bc06e2c70eda3aa0f2ea6e
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.12.34 with commit 6285516170f9e2f04b9dbf1e5100e0d7cbac22b4
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.15.3 with commit 6bfe7ae9bbd9734751b853e2d2e1c13e8b46fd2d
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.16-rc1 with commit 823435bd23108d6f8be89ea2d025c0e2e3769c51

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-2025-38290
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/ath12k/core.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/be049199dec9189602bc06e2c70eda3aa0f2ea6e
	https://git.kernel.org/stable/c/6285516170f9e2f04b9dbf1e5100e0d7cbac22b4
	https://git.kernel.org/stable/c/6bfe7ae9bbd9734751b853e2d2e1c13e8b46fd2d
	https://git.kernel.org/stable/c/823435bd23108d6f8be89ea2d025c0e2e3769c51