Bug 2481924 (CVE-2026-45922)

Summary:	CVE-2026-45922 kernel: RDMA/mlx5: Fix memory leak in GET_DATA_DIRECT_SYSFS_PATH handler
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
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel, specifically within the RDMA/mlx5 component. When the GET_DATA_DIRECT_SYSFS_PATH handler processes a device path, it allocates memory. If the device path's length exceeds the designated output buffer, the allocated memory is not properly released. This oversight results in a memory leak, which can lead to resource exhaustion and potentially impact system stability.	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 15:02:36 UTC

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

RDMA/mlx5: Fix memory leak in GET_DATA_DIRECT_SYSFS_PATH handler

The UVERBS_HANDLER(MLX5_IB_METHOD_GET_DATA_DIRECT_SYSFS_PATH) function
allocates memory for the device path using kobject_get_path(). If the
length of the device path exceeds the output buffer length, the function
returns -ENOSPC but does not free the allocated memory, resulting in a
memory leak.

Add a kfree() 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 01:14:14 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052724-CVE-2026-45922-fcb3@gregkh/T