Bug 2536419 (CVE-2026-93070)

Summary:	CVE-2026-93070 kernel: media: ipu6: Do not free aux device pdata after init
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:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, 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 `ipu6` media driver of the Linux kernel. This vulnerability arises from incorrect handling of auxiliary device private data during initialization, leading to a double free condition. A local attacker could potentially exploit this to cause a denial of service or other memory corruption impacts.	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 2026-09-17 17:45:28 UTC

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

media: ipu6: Do not free aux device pdata after init

ipu6_bus_initialize_device() stores the isys/psys pdata pointer in
struct ipu6_bus_device and initializes the auxiliary device. After that
point, error unwinding must drop the auxiliary device reference and let
ipu6_bus_release() free both the bus device and adev->pdata.

The isys and psys init paths already call put_device() when MMU
initialization fails, and ipu6_bus_add_device() calls
auxiliary_device_uninit() on auxiliary_device_add() failure. Both paths
therefore run the bus release callback. The extra kfree(pdata) in the
callers can release the same object a second time.

Remove the manual pdata frees after the auxiliary device has been
initialized.

This issue was found by a static analysis checker and confirmed by
manual source review.

Comment 1 gkamathe 2026-09-19 22:20:51 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93070.mbox