Bug 2365271 (CVE-2025-37849)

Summary:	CVE-2025-37849 kernel: KVM: arm64: Tear down vGIC on failed vCPU creation
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:	dfreiber, drow, jburrell, rhel-process-autobot, vkumar, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A use-after-free flaw was found in KVM for arm64 in the Linux Kernel, if the kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor. This vulnerability could even lead to a kernel information leak problem.	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 2025-05-09 07:02:44 UTC

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

KVM: arm64: Tear down vGIC on failed vCPU creation

If kvm_arch_vcpu_create() fails to share the vCPU page with the
hypervisor, we propagate the error back to the ioctl but leave the
vGIC vCPU data initialised. Note only does this leak the corresponding
memory when the vCPU is destroyed but it can also lead to use-after-free
if the redistributor device handling tries to walk into the vCPU.

Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the
vGIC vCPU structures are destroyed on error.

Comment 1 Michal Findra 2025-05-09 08:29:46 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050918-CVE-2025-37849-2a30@gregkh/T

Comment 3 errata-xmlrpc 2026-01-19 13:14:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:0804 https://access.redhat.com/errata/RHSA-2026:0804

Comment 4 errata-xmlrpc 2026-01-21 09:39:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:0917 https://access.redhat.com/errata/RHSA-2026:0917

Comment 5 errata-xmlrpc 2026-01-28 00:23:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:1443 https://access.redhat.com/errata/RHSA-2026:1443

Comment 6 errata-xmlrpc 2026-01-28 00:29:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:1441 https://access.redhat.com/errata/RHSA-2026:1441

Comment 7 errata-xmlrpc 2026-01-28 15:04:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:1495 https://access.redhat.com/errata/RHSA-2026:1495

Comment 8 errata-xmlrpc 2026-01-28 15:08:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:1494 https://access.redhat.com/errata/RHSA-2026:1494

Comment 9 errata-xmlrpc 2026-03-30 16:04:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:6193 https://access.redhat.com/errata/RHSA-2026:6193