linux-cve-announce - CVE-2026-23135: wifi: ath12k: fix dma_free

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Message-ID: <2026021438-CVE-2026-23135-74c1@gregkh>
Date: Sat, 14 Feb 2026 16:14:41 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23135: wifi: ath12k: fix dma_free_coherent() pointer

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

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

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

wifi: ath12k: fix dma_free_coherent() pointer

dma_alloc_coherent() allocates a DMA mapped buffer and stores the
addresses in XXX_unaligned fields.  Those should be reused when freeing
the buffer rather than the aligned addresses.

The Linux kernel CVE team has assigned CVE-2026-23135 to this issue.


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

	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.6.122 with commit 36e0bc5e8b282564906fca636c4ebc99814de4e7
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.12.68 with commit 24585a13c41ea7253ee59aac74441fb570f5824a
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.18.8 with commit 4846b32be324f4dd3653f38a3f69c049543d52ae
	Issue introduced in 6.3 with commit d889913205cf7ebda905b1e62c5867ed4e39f6c2 and fixed in 6.19 with commit bb97131fbf9b708dd9616ac2bdc793ad102b5c48

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-2026-23135
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/ce.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/36e0bc5e8b282564906fca636c4ebc99814de4e7
	https://git.kernel.org/stable/c/24585a13c41ea7253ee59aac74441fb570f5824a
	https://git.kernel.org/stable/c/4846b32be324f4dd3653f38a3f69c049543d52ae
	https://git.kernel.org/stable/c/bb97131fbf9b708dd9616ac2bdc793ad102b5c48