Bug 2396431 (CVE-2022-50386)

Summary:	CVE-2022-50386 kernel: Bluetooth: L2CAP: Fix user-after-free
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:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:		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 2025-09-18 14:04:46 UTC

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

Bluetooth: L2CAP: Fix user-after-free

This uses l2cap_chan_hold_unless_zero() after calling
__l2cap_get_chan_blah() to prevent the following trace:

Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref
*kref)
Bluetooth: chan 0000000023c4974d
Bluetooth: parent 00000000ae861c08
==================================================================
BUG: KASAN: use-after-free in __mutex_waiter_is_first
kernel/locking/mutex.c:191 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common
kernel/locking/mutex.c:671 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400
kernel/locking/mutex.c:729
Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389

Comment 1 Keith Grant 2025-09-18 15:21:17 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091852-CVE-2022-50386-07d7@gregkh/T

Comment 5 errata-xmlrpc 2025-10-27 09:35:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:19103 https://access.redhat.com/errata/RHSA-2025:19103

Comment 6 errata-xmlrpc 2025-10-27 09:38:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:19102 https://access.redhat.com/errata/RHSA-2025:19102

Comment 8 errata-xmlrpc 2025-11-12 05:14:42 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-2025:21083 https://access.redhat.com/errata/RHSA-2025:21083

Comment 9 errata-xmlrpc 2025-11-12 08:09:00 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:21091 https://access.redhat.com/errata/RHSA-2025:21091

Comment 10 errata-xmlrpc 2025-11-12 15:05:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:21136 https://access.redhat.com/errata/RHSA-2025:21136

Comment 11 errata-xmlrpc 2025-11-25 00:37:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2025:22006 https://access.redhat.com/errata/RHSA-2025:22006

Comment 12 errata-xmlrpc 2025-11-25 17:16:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2025:22095 https://access.redhat.com/errata/RHSA-2025:22095

Comment 13 errata-xmlrpc 2025-11-25 18:13:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2025:22124 https://access.redhat.com/errata/RHSA-2025:22124

Comment 14 errata-xmlrpc 2025-12-04 12:45:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2025:22752 https://access.redhat.com/errata/RHSA-2025:22752

Comment 15 errata-xmlrpc 2025-12-09 11:34:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2025:22910 https://access.redhat.com/errata/RHSA-2025:22910

Comment 16 errata-xmlrpc 2025-12-09 12:17:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2025:22914 https://access.redhat.com/errata/RHSA-2025:22914

Comment 18 errata-xmlrpc 2025-12-17 07:47:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2025:23445 https://access.redhat.com/errata/RHSA-2025:23445