Bug 2348136 (CVE-2022-49114)

Summary:	CVE-2022-49114 kernel: scsi: libfc: Fix use after free in fc_exch_abts_resp()
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, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's SCSI libfc library in the `fc_exch_abts_resp()` function, which can lead to a use-after-free scenario. This issue can occur because the function calls `fc_exch_release()`, which decrements a reference count stored in the `ep` object and then frees the object once the count is zero. However, the `ep` object is referenced again and can result in the now-freed `ep` pointer being accessed, resulting in system instability, memory corruption, and potential arbitrary code execution.	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 2025-02-26 03:18:52 UTC

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

scsi: libfc: Fix use after free in fc_exch_abts_resp()

fc_exch_release(ep) will decrease the ep's reference count. When the
reference count reaches zero, it is freed. But ep is still used in the
following code, which will lead to a use after free.

Return after the fc_exch_release() call to avoid use after free.

Comment 1 Avinash Hanwate 2025-02-26 20:55:18 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022602-CVE-2022-49114-86bb@gregkh/T

Comment 5 errata-xmlrpc 2025-07-01 00:38:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Via RHSA-2025:10005 https://access.redhat.com/errata/RHSA-2025:10005

Comment 6 errata-xmlrpc 2025-07-01 01:03:09 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-2025:10009 https://access.redhat.com/errata/RHSA-2025:10009

Comment 7 errata-xmlrpc 2025-07-01 22:42:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:10174 https://access.redhat.com/errata/RHSA-2025:10174

Comment 8 errata-xmlrpc 2025-07-02 04:37:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2025:10179 https://access.redhat.com/errata/RHSA-2025:10179

Comment 9 errata-xmlrpc 2025-07-02 06:46:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:10193 https://access.redhat.com/errata/RHSA-2025:10193