Bug 2422695 (CVE-2025-68182)

Summary:	CVE-2025-68182 kernel: wifi: iwlwifi: fix potential use after free in iwl_mld_remove_link()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
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 use-after-free was found in the Intel iwlwifi driver in the Linux kernel. The iwl_mld_remove_link() function frees a link structure via kfree_rcu() but then dereferences it to read fw_id. Since RCU freeing is asynchronous, this creates a potential use-after-free window.	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 14:04:21 UTC

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

wifi: iwlwifi: fix potential use after free in iwl_mld_remove_link()

This code frees "link" by calling kfree_rcu(link, rcu_head) and then it
dereferences "link" to get the "link->fw_id".  Save the "link->fw_id"
first to avoid a potential use after free.

Comment 1 Alexander B 2025-12-17 02:24:40 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121632-CVE-2025-68182-87b4@gregkh/T