Bug 2345865 (CVE-2025-0622)

Summary:	CVE-2025-0622 grub2: command/gpg: Use-after-free due to hooks not being removed on module unload
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:	security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in command/gpg. In some scenarios, hooks created by loaded modules are not removed when the related module is unloaded. This flaw allows an attacker to force grub2 to call the hooks once the module that registered it was unloaded, leading to a use-after-free vulnerability. If correctly exploited, this vulnerability may result in arbitrary code execution, eventually allowing the attacker to bypass secure boot protections.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Deadline:	2025-02-18

Description OSIDB Bzimport 2025-02-14 22:21:36 UTC

In some scenarios hooks created by loaded modules are not being removed when the related module is being unloaded. An attacker may leverage this by forcing the grub2 to call the hooks once the module which registered it was unloaded, leading to a Use-after-free vulnerability. If correctly exploited this vulnerability may result in Arbitrary Code Execution eventually allowing the attacker to by-pass secure boot protections.

Comment 2 errata-xmlrpc 2025-05-13 08:41:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:6990 https://access.redhat.com/errata/RHSA-2025:6990