Bug 2422732 (CVE-2025-68204)

Summary:	CVE-2025-68204 kernel: Linux kernel: Denial of Service due to generic power domain leak
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	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel. Improper error handling during generic power domain (genpd) provider registration can lead to a memory leak. This can be exploited by a local user to trigger a kernel crash, resulting in a Denial of Service (DoS) to the system.	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 2025-12-16 14:07:16 UTC

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

pmdomain: arm: scmi: Fix genpd leak on provider registration failure

If of_genpd_add_provider_onecell() fails during probe, the previously
created generic power domains are not removed, leading to a memory leak
and potential kernel crash later in genpd_debug_add().

Add proper error handling to unwind the initialized domains before
returning from probe to ensure all resources are correctly released on
failure.

Example crash trace observed without this fix:

  | Unable to handle kernel paging request at virtual address fffffffffffffc70
  | CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.0-rc1 #405 PREEMPT
  | Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform
  | pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
  | pc : genpd_debug_add+0x2c/0x160
  | lr : genpd_debug_init+0x74/0x98
  | Call trace:
  |  genpd_debug_add+0x2c/0x160 (P)
  |  genpd_debug_init+0x74/0x98
  |  do_one_initcall+0xd0/0x2d8
  |  do_initcall_level+0xa0/0x140
  |  do_initcalls+0x60/0xa8
  |  do_basic_setup+0x28/0x40
  |  kernel_init_freeable+0xe8/0x170
  |  kernel_init+0x2c/0x140
  |  ret_from_fork+0x10/0x20

Comment 1 Alexander B 2025-12-17 00:02:56 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121631-CVE-2025-68204-8659@gregkh/T