Bug 2516256 (CVE-2026-72059)

Summary:	CVE-2026-72059 kernel: net: wwan: t7xx: destroy DMA pool on CLDMA late init failure
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's `net: wwan: t7xx` component. This issue occurs during the initialization of the Cellular Direct Memory Access (CLDMA) module. If the setup of the transmit or receive rings fails, a dedicated memory resource, known as a Direct Memory Access (DMA) pool, is not properly released. This oversight leads to a memory leak, which could potentially degrade system performance or stability over an extended period.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:02:58 UTC

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.

Comment 1 gkamathe 2026-08-17 13:31:23 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081517-CVE-2026-72059-2fd9@gregkh/T