Bug 2482037 (CVE-2026-45863)

Summary:	CVE-2026-45863 kernel: i3c: dw: Fix memory leak in dw_i3c_master_i2c_xfers()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
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
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's i3c dw driver. The dw_i3c_master_i2c_xfers() function allocates memory for a transfer structure. However, if a runtime power management operation fails, the allocated memory is not properly released. This oversight leads to a memory leak, which can degrade system performance over time.	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 2026-05-27 15:08:13 UTC

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

i3c: dw: Fix memory leak in dw_i3c_master_i2c_xfers()

The dw_i3c_master_i2c_xfers() function allocates memory for the xfer
structure using dw_i3c_master_alloc_xfer(). If pm_runtime_resume_and_get()
fails, the function returns without freeing the allocated xfer, resulting
in a memory leak.

Add a dw_i3c_master_free_xfer() call to the error path to ensure the
allocated memory is properly freed.

Compile tested only. Issue found using a prototype static analysis tool
and code review.

Comment 1 Keith Grant 2026-05-28 04:03:10 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052711-CVE-2026-45863-a8fa@gregkh/T