CVE-2026-72059: net: wwan: t7xx: destroy DMA pool on CLDMA late init failure

From: Greg Kroah-Hartman <[email protected]>

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

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

net: wwan: t7xx: destroy DMA pool on CLDMA late init failure

t7xx_cldma_late_init() creates md_ctrl->gpd_dmapool before
initializing the TX and RX rings. If any ring initialization
fails, the error path frees the already initialized rings but
leaves the DMA pool allocated.

Destroy md_ctrl->gpd_dmapool on the late-init failure path
to avoid leaking the DMA pool.

The Linux kernel CVE team has assigned CVE-2026-72059 to this issue.


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

	Issue introduced in 5.19 with commit 39d439047f1dc88f98b755d6f3a53a4ef8f0de21 and fixed in 6.1.178 with commit cef50f9f9045ff5e6a9d62c5110522df98fca645
	Issue introduced in 5.19 with commit 39d439047f1dc88f98b755d6f3a53a4ef8f0de21 and fixed in 6.6.145 with commit fd01247bde1add970fae7f0003af085333a256e6
	Issue introduced in 5.19 with commit 39d439047f1dc88f98b755d6f3a53a4ef8f0de21 and fixed in 6.12.97 with commit ebd84cb129fac7f7933628c40fccdfa8a62805de
	Issue introduced in 5.19 with commit 39d439047f1dc88f98b755d6f3a53a4ef8f0de21 and fixed in 6.18.40 with commit e89b8829693e65217d587dceeaad4826c96c731b
	Issue introduced in 5.19 with commit 39d439047f1dc88f98b755d6f3a53a4ef8f0de21 and fixed in 7.1.5 with commit 0c0a8c7821485f32bdb4923fb22f2dd501a27d8a
	Issue introduced in 5.19 with commit 39d439047f1dc88f98b755d6f3a53a4ef8f0de21 and fixed in 7.2-rc1 with commit 2bd6f26d4ce1e87de4d736b1e8896daf3acf1c0e

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-2026-72059
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/wwan/t7xx/t7xx_hif_cldma.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/cef50f9f9045ff5e6a9d62c5110522df98fca645
	https://git.kernel.org/stable/c/fd01247bde1add970fae7f0003af085333a256e6
	https://git.kernel.org/stable/c/ebd84cb129fac7f7933628c40fccdfa8a62805de
	https://git.kernel.org/stable/c/e89b8829693e65217d587dceeaad4826c96c731b
	https://git.kernel.org/stable/c/0c0a8c7821485f32bdb4923fb22f2dd501a27d8a
	https://git.kernel.org/stable/c/2bd6f26d4ce1e87de4d736b1e8896daf3acf1c0e