CVE-2026-72475: dmaengine: dma-axi-dmac: Properly free struct axi_dmac_desc

CVE-2026-72475: dmaengine: dma-axi-dmac: Properly free struct axi_dmac_desc

[Greg Kroah-Hartman]

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

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

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

dmaengine: dma-axi-dmac: Properly free struct axi_dmac_desc

Use axi_dmac_free_desc() to free fully the descriptor at fail path when
call axi_dmac_alloc_desc() in axi_dmac_prep_peripheral_dma_vec().

The Linux kernel CVE team has assigned CVE-2026-72475 to this issue.


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

	Issue introduced in 6.11 with commit 74609e5686701ed8e8adc3082d15f009e327286d and fixed in 6.12.97 with commit 36e9cbbfc09ef792918e6a276dd7e2dbca7f31ce
	Issue introduced in 6.11 with commit 74609e5686701ed8e8adc3082d15f009e327286d and fixed in 6.18.40 with commit 9f1ef67c041ef592c13603957ba08b6f21010004
	Issue introduced in 6.11 with commit 74609e5686701ed8e8adc3082d15f009e327286d and fixed in 7.1.5 with commit f055829151eed5a9ec4af98a6c1ce75dbaf2e372
	Issue introduced in 6.11 with commit 74609e5686701ed8e8adc3082d15f009e327286d and fixed in 7.2-rc1 with commit 4910ce1b3b35687bb2a5e742c4bfbea3c647c980

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-2026-72475
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/dma/dma-axi-dmac.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/36e9cbbfc09ef792918e6a276dd7e2dbca7f31ce
	https://git.kernel.org/stable/c/9f1ef67c041ef592c13603957ba08b6f21010004
	https://git.kernel.org/stable/c/f055829151eed5a9ec4af98a6c1ce75dbaf2e372
	https://git.kernel.org/stable/c/4910ce1b3b35687bb2a5e742c4bfbea3c647c980