Bug 2482608 (CVE-2026-46125)

Summary:	CVE-2026-46125 kernel: wifi: mac80211: remove station if connection prep fails
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 flaw was found in the Linux kernel's mac80211 Wi-Fi subsystem. When Multi-Link Operation (MLO) connection preparation fails, the system may not correctly remove the associated station. This can lead to a use-after-free or double-free vulnerability in the debugfs component, potentially causing system instability or unexpected behavior.	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 2026-05-28 11:05:36 UTC

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

wifi: mac80211: remove station if connection prep fails

If connection preparation fails for MLO connections, then the
interface is completely reset to non-MLD. In this case, we must
not keep the station since it's related to the link of the vif
being removed. Delete an existing station. Any "new_sta" is
already being removed, so that doesn't need changes.

This fixes a use-after-free/double-free in debugfs if that's
enabled, because a vif going from MLD (and to MLD, but that's
not relevant here) recreates its entire debugfs.

Comment 1 Keith Grant 2026-05-28 17:53:22 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052816-CVE-2026-46125-b5d0@gregkh/T

Comment 5 errata-xmlrpc 2026-06-16 18:29:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:26428 https://access.redhat.com/errata/RHSA-2026:26428

Comment 6 errata-xmlrpc 2026-06-16 18:55:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:26427 https://access.redhat.com/errata/RHSA-2026:26427

Comment 7 errata-xmlrpc 2026-06-17 01:14:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:26462 https://access.redhat.com/errata/RHSA-2026:26462

Comment 8 errata-xmlrpc 2026-06-17 06:33:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:26515 https://access.redhat.com/errata/RHSA-2026:26515

Comment 9 errata-xmlrpc 2026-06-17 11:58:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:26563 https://access.redhat.com/errata/RHSA-2026:26563

Comment 11 errata-xmlrpc 2026-06-19 23:22:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:27288 https://access.redhat.com/errata/RHSA-2026:27288

Comment 12 errata-xmlrpc 2026-06-22 05:04:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:27731 https://access.redhat.com/errata/RHSA-2026:27731

Comment 13 errata-xmlrpc 2026-06-22 05:56:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:27708 https://access.redhat.com/errata/RHSA-2026:27708

Comment 14 errata-xmlrpc 2026-06-22 06:02:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:27735 https://access.redhat.com/errata/RHSA-2026:27735

Comment 15 Rohit Keshri 2026-06-22 07:22:40 UTC

Attack Scenarios

  Attack Vector:
  - Access Required: Local access, primarily through debugfs interface (default path: /sys/kernel/debug/ieee80211/phy*/stations)
  - Privilege Level: Typically requires root access (debugfs default permissions)
  - Trigger Method: Reading debugfs files after forcing a failed MLO association

  Exploitation Impact:
  1. Minimum Impact: Kernel panic causing denial of service
  2. Maximum Impact: With heap grooming techniques, an attacker could overwrite a freed object with controlled data and hijack kernel execution flow, achieving privilege
  escalation to ring 0 (full kernel privileges)

Comment 16 errata-xmlrpc 2026-06-22 08:29:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:27789 https://access.redhat.com/errata/RHSA-2026:27789