Bug 2516376 (CVE-2026-72074)

Summary:	CVE-2026-72074 kernel: Input: ims-pcu - fix type confusion in CDC union descriptor parsing
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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 `ims-pcu` driver. A type confusion vulnerability exists in the CDC union descriptor parsing, where the driver trusts the `bMasterInterface0` value without proper verification. This could allow a local attacker, or a malicious USB device, to overwrite the private data of another interface, potentially leading to a denial of service.	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 06:09:16 UTC

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

Input: ims-pcu - fix type confusion in CDC union descriptor parsing

The driver currently trusts the bMasterInterface0 from the CDC union
descriptor without verifying that it matches the interface being
probed. This could lead to the driver overwriting the private data of
another interface.

Validate that the control interface found in the descriptor is indeed
the one we are probing.

Comment 1 Keith Grant 2026-08-17 19:53:54 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081519-CVE-2026-72074-2923@gregkh/T